Question

The low electron affinity value of nitrogen is due to :

• A. small size
• B. high nuclear charge
• C. half-filled 2p subshell
• D. high metallic character

Answer 1

The correct option is C half-filled 2p subshell

Nitrogen atom, in its ground state, has a stable half-filled configuration of $1s^2$$2s^2$$2p^3$. 2p subshell is half-filled in the atom. Hence, its electron affinity is low.