Basicity: strongly basic

Elements react strongly basic.

3Li
Lithiumsilvery-white
11Na
Sodiumsilvery white metallic
19K
Potassiumsilvery white, faint bluish-purple hue when exposed to air
20Ca
Calciumdull gray, silver; with a pale yellow tint
37Rb
Rubidiumgrey white
38Sr
Strontiumsilvery white metallic; with a pale yellow tint
55Cs
Caesiumpale gold