Question

Electronic configuration of four elements A, B, C and D are given below, which of the following has
highest electron enthalpy?
(a) 1s^2 2s^2 2p^6
(b) 1s^2 2s^2 2p^4
(c) 1s^2 2s^2 2p^6 3s^1
(d) 1s^2 2s^2 2p^5​

Answer 1

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