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(B) The energy liberated during an electron affinity process is related to the stability of the resulting anion. Option $B$ involves adding an electro

Vedclass · Accepted Answer

$[He] \ 2s^2 \ 2p^2 + e^- 	o [He] \ 2s^2 \ 2p^3$

Vedclass · Answer

(B) The energy liberated during an electron affinity process is related to the stability of the resulting anion. Option $B$ involves adding an electron to a $2p^2$ configuration to form a $2p^3$ configuration. The $2p^3$ configuration is a half-filled $p$-orbital,which is exceptionally stable due to exchange energy and symmetry. Therefore,the process $[He] \ 2s^2 \ 2p^2 + e^- 	o [He] \ 2s^2 \ 2p^3$ (forming the $N^-$ ion) is highly exothermic compared to the others,as it achieves a stable half-filled subshell.

Which electron affinity process would liberate the most energy?

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