Periodic Trends

Front

Valence Electron

Back

Electron on the outermost energy level of an atom

Front

Atomic Radius

Back

How big an atom is

Front

Ionization Energy

Back

How much energy is needed to remove an electron

Front

Group

Back

A column (up and down) on the periodic table

Front

Period

Back

A row (left to right) on the periodic table

Front

Ion charge

Back

How positive or negative an atom is

Front

Alkali Metals

Back

Group 1 on the periodic table

Front

Alkaline Earth Metals

Back

Group 2 on the periodic table

Front

Transition Metals

Back

Groups 3-12 on the periodic table

Front

Halogens

Back

Group 17 on the periodic table