Li
Lithium
Lithium
Li
Na
Sodium
Sodium
Na
K
Potassium
Potassium
K
Ag
Silver
Silver
Ag
Cs
Cesium
Cesium
Cs
Rb
Rubidium
Rubidium
Rb
Francium
Fr
Fr
Francium
o
Oxygen
Oxygen
O
Mg
Magnesium
Magnesium
Mg
Ca
Calcium
Calcium
Ca
Strontium
Sr
Sr
Strontium
Ba
Barium
Barium
Ba