Question

12. Incorrect among the following is/are
(a) Number of electrons having m = 0 in Na are 7
(b) Energy of 4s orbital is more than 3d in H-atom
(C) Energy of 2s orbital in O is more than carbon
(1) (a) only
(2) (b) only
(3) (a) & (b) only
(4) (c) only
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Answer 1

Answer:

(a) and (b) only......