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Q.

Which of the following is electronic configuration of Cu2+Z=29 ?

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a

Ar4s13d8

b

Ar4s23d104p1

c

Ar4s13d10

d

Ar3d9

answer is D.

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Detailed Solution

Cu:  1s22s22p63s23p63d104s1.∴    Cu2+ :  1s22s22p63s23p63d9 or  Ar3d9.
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