Atomic Structure Question 287

Question: Electronic configuration of $ Sc^{21} $ is

Options:

A) $ 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{1} $

B) $ 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{2} $

C) $ 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{0}3d^{3} $

D) $ 1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}4s^{2}3d^{2} $

Show Answer

Answer:

Correct Answer: A

Solution:

According to Aufbau-s rule.



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