VOCAB - Chapters 4 and 5

Front

Center of an atom.

Back

Nucleus

Front

Vertical column in the periodic table.

Back

Group

Front

Visual model of likely electron locations in an atom.

Back

electron cloud model

Front

Two or more atoms bonded together.

Back

Molecule

Front

Basic unit of matter.

Back

Atom

Front

Positively charged ion.

Back

Cation

Front

Total protons + neutrons in an atom's nucleus.

Back

mass number

Front

Subatomic particle with a positive charge in an atom's nucleus.

Back

Proton

Front

Number of protons in an atom's nucleus.

Back

atomic number

Front

Atoms lose, gain, or share electrons to achieve a full set of eight valence electrons.

Back

octet rule