Basic Concepts of the Periodic Table

Front

Basic Organization of the Periodic Table

Back

Elements organized by increasing atomic number, groups (vertical columns), and periods (horizontal rows)

Front

Elements

Back

A pure substance made of only one kind of atom

Front

Atoms

Back

The smallest unit of an element that maintains the properties of that element

Front

Protons

Back

A subatomic particle with a positive charge, found in the nucleus of an atom

Front

Neutrons

Back

A subatomic particle with no charge, found in the nucleus of an atom

Front

Electrons

Back

Negatively charged subatomic particles, found in the electron cloud (orbitals)

Front

Atomic Mass Unit (amu)

Back

A unit for expressing masses of atoms, molecules, or subatomic particles

Front

Average Atomic Mass

Back

The weighted average of the atomic masses of the naturally occurring isotopes of an element

Front

Relative Atomic Mass

Back

The weighted mean mass of an atom of an element relative to 1/12th of the mass of an atom of carbon-12

Front

Groups or Families

Back

Columns on the periodic table that have similar properties