Alkalisk jordmetall

4

Be

9.0122 u

[He] 2s2

Beryllium

Alkalisk jordmetall

12

Mg

24.3059 u

[Ne] 3s2

Magnesium

Alkalisk jordmetall

20

Ca

40.078 u

[Ar] 4s2

Kalcium

Alkalisk jordmetall

38

Sr

87.62 u

[Kr] 5s2

Strontium

Alkalisk jordmetall

56

Ba

137.327 u

[Xe] 6s2

Barium

Alkalisk jordmetall

88

Ra

226 u

[Rn] 7s2

Radium

Alkalisk jordmetall