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  4. Which of the following is electronic configuration of Cu2+ (Z = 29)?

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Q. Which of the following is electronic configuration of $Cu^{2+} (Z = 29)$?

Structure of Atom

Solution:

$Cu: 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}$.
$\therefore Cu^{2+}: 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{9} or [Ar]3d^{9}$