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10 Cards in this Set

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Proton

A positively charged particle located in an atom's nucleus

Neutron

A particle that has no electric charge and is located in an atom's nucleus

Nucleus

The central region of an atom where most of its mass is found in protons and neutrons

Electron

A negatively charged particle located outside an atom's nucleus

Atomic Number

The number of protons in the nucleus of an atom

Atomic Mass Number

The total number of protons and neutrons in an atom's nucleus

Atomic Mass

The average mass of all the atoms of an element

Periodic Table

A table of the elements, arranged by atomic number, that shows the patterns in their properties

Group

A vertical column in the periodic table of the elements

Period

A horizontal row in the periodic table of the elements