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

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

AIIMSAIIMS 1995The d-and f-Block Elements

Solution:

$Cu \left(Z = 29\right) : \left[Ar\right]4s^{1}3d^{10}$

$Cu^{2+}: \left[Ar\right]3d^{9}.$