JEE MAIN - Chemistry (2022 - 25th June Evening Shift - No. 8)
The metal ion (in gaseous state) with lowest spin-only magnetic moment value is :
V2+
Ni2+
Cr2+
Fe2+
Explanation
| Valence shell configuration | Unpaired electrons | |
|---|---|---|
| V2+ | 3d34s0 | n = 3 |
| Ni2+ | 3d84s0 | n = 2 |
| Cr2+ | 3d44s0 | n = 4 |
| Fe2+ | 3d64s0 | n = 4 |
Since Ni2+ has least number of unpaired electrons. Hence Ni2+ will have lowest spin only magnetic moment Value.
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