Question

Considering their electrons affinities, it is possible for alkali metals to form an anion lime M${}^{-}$ where M represents an alkali metal
If true enter 1, else enter 0.

• A. 1

Answer 1

The correct option is A 1
Considering their electrons affinities, it is possible for alkali metals to form an anion $M^{-}$ where M represents an alkali metal. Alkali metals have low negative values of elctron affinity. For example, the electron affinities (in kJ/mol) of Li, Na, K, Rb and Cs are -60, -53, -48, -47 and -46 respectively. Moreover, the anion formed will contain half filled ns subshell which is stable.