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CGP EDU Academic Team
Published on: August 14, 2026
Which of the following will have the most negative electron gain enthalpy and which the least negative ? F, P, S, Cl.
Text Solution
Verified by ExpertsThe correct answer is:
D
In chlorine, the addition of additional electron to larger 3p-subshell experiences less electron-electron repulsion than smaller 2p-subshell of fluorine. Phosphorus has very low electron affinity because there is high electron repulsion when the incoming electron enters an orbital that is already half filled.
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