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Q.

The correct valence electronic configuration for Cu (Z = 29) is

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a

3d9 4s2

b

3d10 4s1

c

3d10 4s2

d

3d8 4s2

answer is B.

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Detailed Solution

Cu(Z = 29).....[Ar] 4s13d10
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The correct valence electronic configuration for Cu (Z = 29) is