Which of the following is the correct order for the theoretical magnetic moment?

Options

A. `Cr^(3+) gt Mn^(2+) = Fe^(3+)`
B. `Cr^(3+)=Mn^(2+)ltFe^(3+)`
C. `Cr^(3+)ltMn^(2+)=Fe^(3+)`
D. `Cr^(3+) lt Mn^(2+) lt Fe^(3+)`

Answer

C

Explanation

`Cr(+3)` = `3d^3` 3 unpaired electron.
`Mn(+2)` = `3d^5` 5 unpaired electron.
`Fe^(+3)` = `3d^5` 5 unpaired electron