• Elements in groups behave similarly.

• Many of the important groups have names.

Group 1

Alkali Metals

Alkali Metals

All have 1 valence electron

All VERY reactive!

• So reactive they are never found in pure form in nature.

• Always in compounds.

• The get more reactive as you go down the column.

Group 2

Alkaline-Earth Metals

Alkaline-earth Metals

All have 2 valence electrons

Alkaline-earth Metals

• Also reactive

• Never found in pure form in nature.

• Not as reactive as the Alkali Metals though.

Group 17

Halogens

Halogens

All have 7 valence electrons

Halogens

Also VERY reactive!

Group 18

Noble Gases

Noble Gases

All have 8 valence electrons

(except for He, it has 2!)

Noble Gases

• Very UNreactive!

• Virtual never found in compounds.

Groups 3-12

Transition Metals

Groups 3-12

• Contains most of the stereotypical metals...

• Gold, silver, copper, iron, titanium, platinum, etc.

Bottom Row known as Rare Earth Metals

Needed for Electronics