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Question

Question: Which of the following options does not represent ground state electronic configuration of an atom?...

Which of the following options does not represent ground state electronic configuration of an atom?

A

1s22s22p63s23p63d84s21s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{8}4s^{2}

B

1s22s22p63s23p63d94s21s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{9}4s^{2}

C

1s22s22p63s23p63d104s11s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}

D

1s22s22p63s23p63d54s11s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{5}4s^{1}

Answer

1s22s22p63s23p63d94s21s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{9}4s^{2}

Explanation

Solution

: The correct representation of the ground state electronic configuration of Cu (29)is 1s22s22p63s23p63d104s11s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}