4th Period Review

The negative subatomic particle in the nucleus of an atom.

• Proton

• Neutron

• Atom

• Electron

Electrons in the outer most energy level of the electron cloud.

• Protons

• Neutrons

• Valence Electrons

• Electrons

The positive subatomic particle in the nucleus of an atom.

• Protons

• Neutrons

• Electrons

• Atom

Number of protons in an atom of the element; used to identify an element.

• Atomic Number

• Mass Number

• Groups

• Periods

Number of protons and neutrons in the nucleus of an atom.

• Atomic Number

• Mass Number

• Groups

• Periods

Aka families; the vertical columns on the periodic table.

• Atomic Number

• Mass Number

• Groups

• Periods

The horizontal rows on the periodic table.

• Atomic Number

• Mass Number

• Groups

• Periods

Weighted average of all of the different versions of an element; measured in amu.

• Atomic Number

• Isotopes

• Ion

• Average atomic mass

A pure substance that can be chemically broken down into

simple and more stable substances; when atoms of two or

more elements are chemically combined.

• Atom

• Element

• Compound

• Substance

A pure substance that cannot be broken down into anything

simpler or more stable.

• Atom

• Element

• Compound

• Substance