Chapter 18 Review

A bond that forms between atoms when they share electrons is a(n) ____ bond.

Covalent

A compound that is composed of only two elements is a(n) ____.

Binary Compound

A(n) ____ is formed when atoms gain, lose or share electrons.

Chemical Bond

A(n) ____ tells what elements make up a compound and the ratios of the atoms of those elements.

Chemical Formula

An atom is _____ when its outer energy level is filled with electrons.

Chemically Stable

A(n) ____ is a compound that has water chemically attached to its ions.

Hydrate

An atom that has gained or lost electrons is called a(n) ____.

Ion

The force of attraction between the opposite charges of the ions in an ionic compound is a(n) ____.

Ionic Bond

Molecules that do not have oppositely charged ends are ____ molecules.

Nonpolar

A positive or negative number that is assigned to an element to show its combining ability in a compound is a(n) ____.

Oxidation Number

A molecule that has a positive and negative end is a(n) ____ molecule.

Polar

A compound that is composed of two elements is a(n) ____.

Polyatomic Ion