Question

x and y are two species with excited state electronic configuration of 1s1 2s1 and 1s1 2s0 2p1 respectively shielding of second electron by one is electron is higher for
(1) x
(2) y
(3) both
(4) none

Answer 1

Explanation:

option B y

because according to hunds rule Both the shells are satisfying and one shell of y remains which is unstable and more reactive.

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