The electron affinities of halogens are F = 3 | vedclass

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Question

(A) The electron affinity of $Cl$ $(349 \ kJ \ mol^{-1})$ is higher than that of $F$ $(322 \ kJ \ mol^{-1})$. This is because the $2p$ subshell of $F$

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Weaker electron-electron repulsion in $Cl$

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(A) The electron affinity of $Cl$ $(349 \ kJ \ mol^{-1})$ is higher than that of $F$ $(322 \ kJ \ mol^{-1})$. This is because the $2p$ subshell of $F$ is very small,leading to significant inter-electronic repulsion when an incoming electron is added. In contrast,the $3p$ subshell of $Cl$ is larger,which results in weaker electron-electron repulsion,making it easier for $Cl$ to accept an electron.

The electron affinities of halogens are $F = 322, Cl = 349, Br = 324, I = 295 \ kJ \ mol^{-1}$. The higher value for $Cl$ as compared to that of $F$ is due to :-

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