The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of `Cr^(3+)` ion is

Options

A. 2.87 B.M
B. 3.87 B.M
C. 3.47 B.M
D. 3.57 B.M

Answer

B

Explanation

`Cr^(3+) : [Ar]^(18) 3d^(3)_("( 3 unpaired electrons)")`
`mu = sqrt( n (n+2)) = sqrt(3(3 + 2)) = 3.87 B.M`