Why do alkali metal tarnishes in air?

Why do alkali metals dissolve in liquid ammonia to form blue solution which is conducting in nature?

(i) Give the formula which expresses the general electronic configuration of actinoids. (ii) Which complexes are formed when actinoid halides react with alkali metal halides? (iii) Why do actinoids get tarnished in air.

Why do alkali metals not occur in free state?

Why do alkali metals have lowest ionisation energy?

Why do the alkali metals possess minimum and the noble gases maximum ionisation energies in respective periods ?

Alkali metals tarnish in dry air because ______.

The reactivity of alkali metals towards air is different for different metals. How do alkali met- als react with air?

Why do alkali metals respond to flame test?

Why do alkali metals have low ionisation enthalpy?