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Section 1 Section 2 Section 3

octet rule

A concept of chemical bonding theory that is based on the assumption that atoms tend to have either empty valence shells or full valence shells of eight electrons. (p. 159)


An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge. (p. 161)


An ion that has a positive charge (p. 161)


An ion that has a negative charge (p. 161)


An ionic compound that forms when a metal atom or a positive radical replaces the hydrogen of an acid (p. 167)

lattice energy

The energy associated with constructing a crystal lattice relative to the energy of all constituent atoms separated by infinite distances (p. 168)

crystal lattice

The regular pattern in which a crystal is arranged (p. 174)

unit cell

The smallest portion of a crystal lattice that shows the three-dimensional pattern of the entire lattice (p. 175)

polyatomic ion

An ion made of two or more atoms (p. 178)

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