Question

The highest magnetic moment is shown by the transition metal with the configuration:

• A. ${3d}^2$
• B. ${3d}^5$
• C. ${3d}^7$
• D. ${3d}^9$

Answer 1

The correct option is B ${3d}^5$

The transition metal with most unpaired electrons shows the highest magnetic moment.

${3d}^2$ = 2 unpaired electron.

${3d}^5$ =5 unpaired electron.

${3d}^7$ =3 unpaired electron.

${3d}^9$ =1 unpaired electron.

Option A, B, C and D have 2,5,3 and 1 unpaired electrons respectively.

Hence the correct solution is B.