Which of the following pair of transition metal ions, have the same calculated 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

`Cr^(2+)(Z=24):[Ar]3d^(4)4s^(0)`, four unapired electrons
`Fe^(2+)(Z=26):[Ar]3d^(6)4s^(0)`, foue unpaired electrons.
`Cr^(2+)` and `Fe^(2+)` have same number of unpaired electrons.
Hence, they have the same value of magnetic moment.