Question

The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of $C{r}^{3+}$ ion is :

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

Answer 1

The correct option is B 3.87 B.M.

${Cr}^{+3}$ has an electronic configuration of $\left[Ar\right]3d^{3}4s^0$ ,having unpaired electrons as $3$.Hence magnetic moment of ${Cr}^{+3}$ is $\sqrt{3(3+2)}=3.87BM$