1.

Which of the following electronic configurations corresponds to elements with largest negative electron gain enthalpy?

Answer»

`1S^(2)2S^(2)2P^(5)`
`1s^(2)2s^(2)2p^(6)`
`1s^(2)2s^(2)2p^(6)3s^(2)3p^(5)`
`1s^(2)2s^(2)2p^(6)3s^(1)`

Answer :C


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