The quantum numbers of differentiating electron of copper atom in 4s-orbital are; n = 4, l = 0, m = 0 and s = +1/2.
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Electronic configuration of Cu is : [Ar]3d104s1
Therefore the quantum no's of the differentiating electron in 4s-orbital are; n = 4, l = 0, m = 0 and s = +1/2
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