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CBSE - XI Science - Chemistry - Classification of Elements and Periodicity in Properties

Given C= -122 N= +31 O= -141 Cl= -328 Arrange them in the decreasing order of their electron gain enthalpy

Asked by Mudita Agrawal 12th September 2013, 10:08 PM
Answered by Expert


By gaining 1 electron, Cl completes its octet (that is, becomes very stable). So its elctron gain enthalpy is the highest followed by oxygen. However, N aton has a half-filled 2p orbital. When it gains one electron, it becomes less stable as indicated by its +enthalpy. Decreasing order is Cl, O, C, N
Answered by Expert 15th September 2013, 8:45 AM

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