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Chemistry
Inorganic: P Block Elements
The electronic configuration of Cu in +1 oxidation state is
[Ar] 3d10
[Ar] 3d9 4s1
[Ar] 3d10 4s1
[Ar] 3d9 4s2
29Cu = [Ar] 4s1 3d10
Cu+ = [Ar] 3d10