Base de Connaissances
Base de Connaissances - Coach de chimie
 
                                                                                    
                                                        Cation vs. Anion vs. Ion... Quelle est la différence? Eh bien, à la fois les cations et les anions sont des ions, ils ont simplement des propriétés physiques différentes. Les cations se forment lorsque...
                                                    
                                                                                                             
                                                                                    
                                                        Comprendre les différentes branches de la chimie peut nous aider à apprécier à quel point cette discipline est prolifique. Dans le monde d'aujourd'hui, les chimistes ne se limitent pas à une simple liste restreinte de disciplines...
                                                    
                                                                                                            
                                                                                                                                                                                                        
                                                                        
                                                                            Physical Chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Organic Chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Inorganic Chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical Kinetics
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical Physics 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Electrochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Femtochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Geochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Photochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Quantum chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Solid-state chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Spectroscopy
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Stereochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Surface science 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Thermochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Calorimetry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Biochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Neurochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molecular biochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Bioorganic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Genetic engineering 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Biophysical chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Medicinal chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Organometallic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Physical organic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Polymer chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Click chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Bioinorganic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Cluster chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Materials chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Nuclear chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Analytical chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Astrochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Cosmochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Computational chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Environmental chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Green chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Supramolecular chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Theoretical chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Wet chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Agrochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Atmospheric chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical engineering
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical biology 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemo-informatics 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Flow chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Immunohistochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Immunochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical oceanography
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Materials science
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Mathematical chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Mechanochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molecular biology
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molecular mechanics
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Nanotechnology
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Petrochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Pharmacology
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Phytochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Radiochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Sonochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Synthetic chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                
                                                         
                                                                                    
                                                        Le Système International d'Unités se compose de sept constantes fondamentales, sept unités de base et 22 unités dérivées.
                                                    
                                                                                                            
                                                                                                                                                                                                        
                                                                        
                                                                            International System of Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            physical quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            defining constants
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            base units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            derived units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            cesium hyperfine splitting frequency
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            speed of light
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            vacuum
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Planck constant
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            elementary charge
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Boltzmann constant
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Avogadro constant
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Kinematic SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Mechanical SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molar SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Electromagnetic SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Photometric SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Thermodynamic SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            International System of Quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Base Quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Derived Quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                                                                                    
                                                         
                                                                                    
                                                        Cation vs. Anion vs. Ion... What is the difference? Well, both cations and anions are ions, they just have different physical properties. Cations are formed when...
                                                    
                                                                                                             
                                                                                    
                                                        Understanding the various branches of chemistry can help us appreciate just how prolific a discipline it is. In today's world, chemists are not limited to just a short list of disciplines...
                                                    
                                                                                                            
                                                                                                                                                                                                        
                                                                        
                                                                            Physical Chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Organic Chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Inorganic Chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical Kinetics
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical Physics 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Electrochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Femtochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Geochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Photochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Quantum chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Solid-state chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Spectroscopy
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Stereochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Surface science 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Thermochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Calorimetry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Biochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Neurochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molecular biochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Bioorganic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Genetic engineering 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Biophysical chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Medicinal chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Organometallic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Physical organic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Polymer chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Click chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Bioinorganic chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Cluster chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Materials chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Nuclear chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Analytical chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Astrochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Cosmochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Computational chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Environmental chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Green chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Supramolecular chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Theoretical chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Wet chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Agrochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Atmospheric chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical engineering
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical biology 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemo-informatics 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Flow chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Immunohistochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Immunochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Chemical oceanography
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Materials science
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Mathematical chemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Mechanochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molecular biology
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molecular mechanics
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Nanotechnology
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Petrochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Pharmacology
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Phytochemistry 
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Radiochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Sonochemistry
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Synthetic chemistry 
                                                                        
                                                                    
                                                                                                                                                                                                
                                                         
                                                                                    
                                                        The International System of Units consists of seven defining constants, seven base units, and 22 derived units.
                                                    
                                                                                                            
                                                                                                                                                                                                        
                                                                        
                                                                            International System of Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            physical quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            defining constants
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            base units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            derived units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            cesium hyperfine splitting frequency
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            speed of light
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            vacuum
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Planck constant
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            elementary charge
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Boltzmann constant
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Avogadro constant
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Kinematic SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Mechanical SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Molar SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Electromagnetic SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Photometric SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Thermodynamic SI Derived Units
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            International System of Quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Base Quantities
                                                                        
                                                                    
                                                                                                                                                                                                                                                                            
                                                                        
                                                                            Derived Quantities