Quiz 2 - Ionic Bonding and Compounds | Ionic Bonding and Properties of Ionic Compounds
General Chemistry 1 - Quiz 2 - Ionic Bonding and Compounds
Which formula best represents an ionic compound formed between magnesium and sulfur?
Magnesium forms a 2+ ion (Mg2+) and sulfur forms a 2- ion (S2-). The correct empirical formula for the ionic compound is MgS, where the charges of the ions balance each other.
Which of the following compounds is most likely to have the highest ionic bond energy?
The ionic bond energy is highest between ions with larger charges and smaller radii. All ions have a charge of +1 or -1. NaF has the smallest ions and therefore has the highest ionic bond energy.
Bonding in which the pair(s) of electrons is shared between more than two atoms is known as:
Delocalized covalent bonding is a type of bonding in which electrons are shared among more than two atoms, as seen in structures like benzene or in resonance structures.
Which of the following compounds is ionic?
KCl is composed of potassium and chloride ions held together by ionic bonds, whereas H2O, CO2, and CH4 are covalently bonded molecules.
Which statement about lattice energy is correct?
Lattice energy is the energy released during the formation of an ionic solid from its gaseous ions. It is directly related to the strength of the ionic bonds. Factors influencing lattice energy:
- Magnitudes of charges: Higher charges on the ions result in greater lattice energies.
- Distance between ions: Smaller distances between the ions result in greater lattice energies.
Which of the following statements is true about the formation of ionic solids?
The formation of ionic solids is an exothermic process because energy is released when positive and negative ions attract each other and form a stable ionic lattice.
Which element has the highest electronegativity?
Fluorine has the highest electronegativity of all elements, meaning it has the greatest tendency to attract electrons towards itself. Electronegativity increases from left to right across a period and decreases from top to bottom down a group in the periodic table.
What does a dipole moment indicate in a molecule?
A dipole moment indicates a separation of positive and negative charges within a molecule, leading to a polar character.
Which of the following has the highest percent ionic character?
HF has the highest percent ionic character due to the large difference in electronegativity between hydrogen and fluorine.
Which of the following pairs of elements is most likely to form an ionic compound?
Sodium (a metal) and fluorine (a nonmetal) are most likely to form an ionic compound due to the large difference in electronegativity between them, resulting in the transfer of an electron from sodium to fluorine.