Which one of the following transition metal ions is paramagnetic?
Which one of the following transition metal ions is paramagnetic?
A. `Ag^+`
B. `Cu^(2-)`
C. `Zn^(2+)`
D. `Cd^(2+)`
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Correct Answer - B
`Cu^(2+)` has `d^9` configuration with one unpaired electron and is paramagnetic whereas `Ag^(+) , Zn^(2+) ` and `Au^+` have `d^10` configuration and are diamagnetic
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