Exploring the Periodic Table

Front

Atomic Radius

Back

The size of the atom. Decreases across the periodic table and increases down the column.

Front

Period

Back

Row (across). Also referred to as energy level.

Front

Group

Back

Column(up and down). Also referred to as family.

Front

Alkali Metals

Back

Group 1. Most reactive metals. Cation. Lose 1 electron to become unreactive. +1 charge. 1 valence electron.

Front

Alkaline Earth Metals

Back

Group 2. Cation. Lose 2 electrons to become unreactive. +2 charge. 2 valence electrons

Front

Halogens

Back

Group 17. Most reactive nonmetals. Anion. Gain 1 electron to become unreactive. -1 charge. 7 valence electrons.

Front

Noble Gas

Back

Group 18. 8 valence electrons (or 2 for Helium). Unreactive. Full outer shell.

Front

Ionization Energy

Back

The energy required to remove an electron. Increases across a period and decreases down a column.

Front

Electronegativity

Back

The ability to attract electrons. Increases across a period and decreases down a column.

Front

Metal

Back

Found to the left of the stair step. Shiny, malleable, conductive, ductile, reacts with acid.