Q. Magnetic moment 2.83 BM is given by which of the following ions? (At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
A) $Ti^{3+}$
B) $Ni^{2+}$
C) $Cr^{3+}$
D) $Mn^{2+}$
Explanation
[Solution] 2.83 BM = $\sqrt{n(n+2)}$ with n = 2; $Ni^{2+}$ ($3d^8$) has 2 unpaired electrons. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.