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

Options

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

Answer

C

Explanation

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