Q. The magnetic moment (in BM) of ${Zn}^{2 +}$ion according to spin-only formula is
A) Zero
B) 1.73
C) 2.84
D) 3.87
Explanation
(a)
${Zn}^{2 +}$ (Z=30):[Ar]$3d^{10}4s^{0}$; zero unpaired electron.
Hence, its magnetic moment is zero.
$\mu$=$\sqrt{n(n + 2)}$=$\sqrt{0(0 + 2)}$
$\mu$= 0
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.