The bivalent metal ion having maximum paramagnetic behavior among the first transition series element is

Options

A. `Mn^(2+)`
B. `Cu^(2+)`
C. `Sc^(2+)`
D. `Cu^(+)`

Answer

a

Explanation

`Mn^(2+)(3d^(5)4s^(0))rightarrow5` unpaired electrons
`CU^(2+)(3d^(9)4s^(0))rightarrow1` unpaired electron
`Sc^(2)(3d^(9)4S^(0))rightarrow` unpaired electron
`Cu^(+)(3d^(10)4S^(0))rightarrow0`unpaired electron
Hence , `Mn^(2+)` has maximum number of unpaired electrons thus , it shows maximum paramagnetic behaviour