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Calculate the magnetic moment and the number of unpaired electrons in Cu2+

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Cu (Z = 29) Electronic configuration [Ar] 3d10 4s1 

Cu2+ Electronic configuration [Ar] 3d9 

The number of unpaired electrons

Magnetic moment µ = \(\sqrt{1(1+2)}\) 

\(\sqrt 3\) = 1.732 µB

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