A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity.

• Metal

• Non-metal

• Luster

• Metalloid

A horizontal row of elements in the periodic table

• Group

• Chemical Symbol

• Electron

• Period

A tiny, negatively charged particle that moves around the outside of the nucleus of an atom.

• Electron

• Neutron

• Proton

• Nucleus

Small, positively charged particles that are found in the nucleus of an atom.

• Proton

• Nucleus

• Electron

• Neutron

An arrangement of the elements showing the repeating pattern of their properties.

• Group

• Chemical Symbal

• Periodic Table

• Period

Elements in the same vertical column of the periodic table; also called family

• Atomic Mass

• Periodic Table

• Period

• Group

A one-or-two letter representation of an element

• Atomic number

• Chemical Symbol

• Element

• Group

A small particle in the nucleus of the atom, with no electrical charge.

• Proton

• Electron

• Neutron

• Nucleus

The number of protons in the nucleus of an atom

• Atomic Number

• Neutron

• Atomic Mass

• Nucleus

The average mass of all the isotopes of an element

• Atomic Weight

• Atomic Number

• Atomic Mass

• Atomic Bomb