Question

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

• A. $T_1^{2+}$
• B. $Mn ^{2+}$
• C. $V ^{2+}$
• D. $Cr ^{2+}$

Answer 1

Answer: (C)

$V ^{2+}$

Answer 2

A substance that may repel or attract other substances is referred to as a "magnetic material." The arrangement of electrons, also known as the magnetic moment of the material, determines whether these materials are attracted to or repel one another. The magnetic dipole moment of an object is a measure of the torque experienced by it in the presence of a magnetic field.

Cr+2:[Ar],3d4,4s0 n=4, μ=4(4+2)​=24​
=4.89BM

Mn+2:[Ar],3d5,4s0 n=5,μ=5(5+2)​=35​
=5.91BM

V+2:[Ar],3d3,4s0 n=3,μ=3(3+2)​=15​
=3.87BM

Ti+2:[Ar],3d2,4s0 n=2,μ=2(2+2)​=8​
=2.82BM