Fluorine has less negative electron gain enthalpy than chlorine


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Explain why the electron gain enthalpy of fluorine is less negative than that of chlorine..

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The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction.

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