Question

alkali metals do not form the positive ions why

Answer 1

alkali metals tend toform singly charged positive ions(cations) when they react with nonmetals. ... In the metallic state, either pure or in alloys with other alkali metals, the valence electrons become delocalized and mobile as they interact to form a half-filled valence band.

Answer 2

Alkali metals tend to lose one electron and form ions with a single positivecharge. They form ionic compounds (salts) in reaction with the halogens (alkali halides). Sodium and potassiumions form important constituents of body fluids (electrolytes).