Question

The element which readily forms an ionic bond has the electronic configuration

(a) 1s²2s²2p³

(b) 1s²2s²2p¹

(c) 1s²2s²2p²

(d) 1s²2s²2p⁶3s¹

Answer 1

Answer is : (d) 1s²2s²2p⁶3s¹

Alkali metals have the highest tendency to form ionic bond as they have low ionisation energy. The general electronic configuration of alkali metal is ns¹. Among the given electronic configuration, 1s²2s²2p⁶3s¹ corresponds to the configuration of Na, which is an alkali metal and hence forms ionic bond readily.