Which of the following electronic configuration is not possible

1.	Which of the following electronic configuration is not possible
Answer» `4d^(8)` `3f^(14)` `3s^(1)` `2p^(6)` SOLUTION : `3f^(14)` has n = 3 `therefore`Values of I = 2, 1, 0 and Hence subshell d, p, s respectively. Thus if n = 3 then f is not POSSIBLE i.e `3f^(14)` arrangement is not allowed. While (A) `4d^(8) 3s^(1)` and `2p^(6)`configuration are permitted

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