lithium
alkali metal
sodium
alkali metal
potassium
alkali metal
rubidium
alkali metal
cesium
alkali metal
francium
alkali metal
beryllium
Alkaline Earth Metals
magnesium
Alkaline Earth Metals
calcium
Alkaline Earth Metals
stronium
Alkaline Earth Metals
barium
Alkaline Earth Metals
radium
Alkaline Earth Metals
fluorine
halogen
chlorine
halogen
bromine
halogen
iodine
halogen
astatine
halogen
tennessine
halogen
helium
noble gas
krypton
noble gas
neon
noble gas
argon
noble gas
xenon
noble gas
radon
noble gas