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Question
Which ion has the highest value of theoretical magnetic moment?
Options
Cr3+
Co3+
Ti3+
V3+
MCQ
Solution
Co3+
Explanation:
Magnetic moment = `sqrt("n"("n" + 2))` BM
(where n = number of unpaired electrons)
As a result, the quantity of unpaired electrons has a direct relationship with a magnetic moment.
| Ion | Outer electronic conftguratlon | No. of unpaired electrons | Calculated value of magnetic moment |
| Cr3+ | 3d3 | 3 | 3.87 BM |
| Co3+ | 3d6 | 4 | 4.90 BM |
| Ti3+ | 3d1 | 1 | 1.73 BM |
| V3+ | 3d2 | 2 | 2.83 BM |
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Trends in Atomic Properties of the First Transition Series
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