Question

Which among the following is/are correct about chromium?

• A. Its electronic configuration is $3d^{5}4s^1$
• B. Total spin of chromium is 3
• C. Spin multiplicity of 3d-subshell of chromium is 6
• D. Magnetic moment of chromium is $\sqrt{48}$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Its electronic configuration is $3d^{5}4s^1$
B Total spin of chromium is 3
C Spin multiplicity of 3d-subshell of chromium is 6
D Magnetic moment of chromium is $\sqrt{48}$

Spin multiplicity $=2\sum s+1$
$S=\frac{1}{2}$ (No. of unpaired $e^{-}$)
Spin multiplicity $=2\times \frac{5}{2}+1=6$
Total spin $=\frac{1}{2}\times (No.ofunpaired{e}^{-})=\frac{1}{2}\times 6=3$
Magnetic moment $=\sqrt{n(n+2)}=\sqrt{6(6+2)}=\sqrt{48}$