Which of the following ions has a magnetic moment of 5.93 BM?
(At. No. `V=23, Cr=24, Mn=25, Fe=26`)

Options

A. a)`Mn^(2+)`
B. b)`Fe^(2+)`
C. c)`Cr^(2+)`
D. d)`V^(3+)`

Answer

A

Explanation

Magnetic moment = `sqrt(n(n+2))` BM
where n = number of unpaired electrons
`5.93=sqrt(n(n+2))`
`n=5`
`Mn^(2+)` ion `(3d^(5))` has 5 unpaired electrons and magnetic moment is 5.93 BM.