Which of following will have the most negative electron gain enthalpy and which the least negative? F, P, S, Cl

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P, Cl

Cl, F

Cl, S

Cl, P

answer is D.

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Detailed Solution

Cl→[Ne]3s23p5P→[Ne]3s23p3⟶ stable half-filled configuration Most negative electron gain enthalpy →Cl Least negative electron gain enthalpy →P

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