Magnetic Moment

The spin-only magnetic moment,

%5Cmu

, for a transition metal ion is calculated using the formula:

%5Cmu%20%3D%20%5Csqrt%7Bn(n%2B2)%7D%20%5Ctext%7B%20BM%7D

where

n

is the number of unpaired electrons. For

%5Ctext%7BCr%7D%5E%7B3%2B%7D

, which has an electronic configuration of

3d%5E3

(reflecting the loss of three electrons from the neutral state of Cr), the number of unpaired electrons

n

is 3. Calculating the magnetic moment:

%5Cmu%20%3D%20%5Csqrt%7B3(3%2B2)%7D%20%3D%20%5Csqrt%7B15%7D%20%5Capprox%203.873%20%5Ctext%7B%20BM%7D

Thus, the correct answer is

%5Cmu%20%5Capprox%203.873%20%5Ctext%7B%20BM%7D

Chapter Questions
1 MCQs