CoachThe alkali metals (Li, Na, K, Rb, Cs, Fr) form group 1, with one valence electron ns; the alkaline-earth metals (Be, Mg, Ca, Sr, Ba, Ra) form group 2, with ns. Their elements are the s-block.
Chemistry · Glossary
What is Alkali and alkaline-earth metals?
Also known as: alkali metal · alkaline-earth metal