The value of the spin only magnetic moment of a particular ion is 2.83 Bohr magneton. The ion is

Options

A. `Fe^(2+)`
B. `Ni^(2+)`
C. `Mn^(2+)`
D. `Co^(3+)`

Answer

B

Explanation

For `1s, 3s, 3d` and `2p` orbital, `l=0, 0, 2, 1` respectively.
Orbital angular momentum`=sqrt(l(l+1))ħ`