Question

Which of the following sets of quantum numbers is not possible for 23rd electron of Cr (at.no. 24) ?
(A) 3, 2, +2, -½ (B) 3, 2, -2, + ½ (C) 3, 2, + 1, + ½ (D) 3, 1, + 1, + ½.

Answer 1

the answer is A option

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Answer 2

d is correct since 3p is already fulfilled and only 3d is empty therfore d is correct one