Chapter 7 Review

The force that holds two atoms together is called a(n) __________________.

• chemical bond

• electron

• energy level

• ion

An ionic bond is

• attraction of an atom for its electrons.

• attraction of atoms for electrons they share.

• a force that holds together atoms that are oppositely charged.

• the movement of electrons from one atom to another.

The overall charge of a formula unit for an ionic compound __________.

• a. is always zero.

• b. is always negative.

• c. is always positive.

• d. may have any value.

How many chloride (Cl^-) ions are present in a formula unit of magnesium chloride, given that the charge on a Mg ion is 2+?

• one-half

• one

• two

• four

Ionic bonds generally occur between ______________.

• Metals

• nonmetals

• metals and nonmetals

• noble gases

A three-dimensional arrangement of particles in an ionic solid is called a(n)

• a. crystal lattice.

• b. sea of electrons.

• c. formula unit.

• d. electrolyte.

Write the chemical name: NaI

Write the chemical name: CaCl₂

Write the name of the compound: Fe₂O₃

Write the chemical formula: beryllium nitride

Answer explanation

Be₃N₂