Knowledge Base

atoms average kinetic energy chemical properties of matter diffusion gas kinetic kinetic molecular theory lattice liquid molecules particles phase physical properties of matter pressure solid temperature volume

AXE method bonding pairs bonding patterns central atom ideal bond angle lone pair long-chain molecule molecular geometry molecular shape multiple bonds multiple central atoms non-polar physical properties polarity polar steric number structure of molecules VSEPR

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

periodic table chemical elements of matter periods groups atomic number electron shell configuration filling of electrons in valence shells Dimitri Mendeleev unstable elements transactinides element blocks s-block p-block d-block f-block non-reactive elements metals metalloids nonmetals g-block extended periodic table IUPAC The Long Periodic Table The 32-Column Periodic Table Madelung rule Aufbau principle

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

intensive properties chemical potential concentration density magnetic permeability melting point boiling point specific gravity molality pressure refractive index specific conductance electrical conductivity specific heat capacity specific internal energy specific rotation specific volume standard reduction potential surface tension temperature thermal conductivity viscosity extensive properties amount of substance enthalpy entropy Gibbs energy heat capacity Helmholtz energy internal energy mass volume chemical properties ability to corrode acidity basicity substance chemical stability combustibility enthalpy of formation flammability heat of combustion preferred oxidation state toxicity average atomic mass  atomic size electron configuration electronegativity Pauling First Ionization Energy radii Van der Waals   covalent valence electrons electron gain enthalpy  electron affinity Properties of Matter physical properties extensive intensive chemical properties states of matter properties of elements periodic table compound homogeneous mixture heterogeneous mixture