Which of the following pair of transition metal ions, have the same calculate values of magnetic moment ?

Options

A. `Ti^2+ and V^2+`
B. `Fe^2+ and Cu^2+`
C. `Cr^2+ and Fe^2+`
D. `Co^2+ and Ti^2+`

Answer

(c

Explanation

Magnetic moment depend upon number of unpaired electrrons
`Cr^2+ (Z = 24) : [Ar]3d^4`4s^circ , 4 unpaired electrons
`Fe^2+ (Z = 26) : [Ar] 3d^64s^circ` , 4 unpaired electrons .
The number of unpaired electrons in `Cr^2+` and `Fe^2+` are same, hence they have same magnetic moments .