Which of the following electronic configuration would be associated with the highest magnetic moment ?
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| Electronic configuration | No. of unpaired electron | |
| 1 | [Ar]3d3 ⇒ | 3 |
| 2 | [Ar]3d6 ⇒ | 4 |
| 3 | [Ar]3d8 ⇒ | 2 |
| 4 | [Ar]3d7 ⇒ | 3 |
More are the no. of unpaired electron, more is the magnetic moment (spin only)