d-and f-Block Elements — Chemistry STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryd-and f-Block Elements1 Mark
Question
Why is $ Cu^{+} $ diamagnetic whereas $ Cu^{2+} $ is paramagnetic?
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Answer
$ Cu^{+} $ has configuration [Ar] $ 3d^{10} $ whereas $ Cu^{2+} $ has [Ar] $ 3d^{9} $. It is thus evident that $ Cu^{+} $ has no unpaired electron and thus diamagnetic. $ Cu^{2+} $ has one unpaired electron in 3d sub-shell and thus paramagnetic.
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