The correct valence electronic configurations of Cr and Cu among the following electronic configurations are3d54s1-I 3d104s1-II3d44s2-III 3d94s2-IV
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a
Cr-I; Cu-IV
b
Cr-III; Cu-IV
c
Cr-II; Cu-III
d
Cr-I; Cu-II
answer is D.
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Detailed Solution
The correct valence electronic configuration of Cr and Cu are 3d54s1 and 3d104s1 respectively. due to the more stability of half-filled and completely filled configurations.