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Electron gain enthalpy of the elements of the halogen group becomes less negative down the group. But, why the negative electron gain enthalpy of fluorine is less than that of chlorine?

Asked by Topperlearning User 12th June 2014, 9:13 AM
Answered by Expert
Answer:

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

Answered by Expert 12th June 2014, 11:13 AM
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