Chemical Bonding 7

An ionic bond results from electrical attraction between

• cations and anions

• atoms

A nonpolar covalent bond is unlikely when two atoms of different elements join because the atoms are likely to differ in

• electronegativity

• polarity

Bond length is the distance between two bonded atoms at

• their minimum potential energy

• their maximum kinetic energy

To draw a Lewis structure, it is not necessary to know

• which atoms are in the molecule

• bond energies

For multiple covalent bonds to form in molecules, the molecules must contain carbon, nitrogen, or

• oxygen

• helium

The principle that states that atoms tend to form compounds in which each atom has eight electrons in its highest occupied energy level is called the

• rule of eights

• configuration rule

An example of a molecule that cannot be represented adequately by a single Lewis structure is

• O3

• N2

Lattice energy is an indication of the

• strength of an ionic bond

• number of ions in a crystal

A covalent bond in which the bonded atoms have an unequal attraction for the shared electrons is called a(n)

• polar covalent bond

• ionic bond

A molecule containing two atoms is called a(n)

• diatomic molecule

• polyatomic ion