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The magnetic moment of \(\mathrm{Mn^{2+}}\) ion is

Question and options

The magnetic moment of Mn2+\mathrm{Mn^{2+}} ion is
  1. 5.92 BM
  2. 2.80 BM
  3. 8.95 BM
  4. 3.90 BM

Answer and explanation

Correct answer: A - 5.92 BM
Mn2+\mathrm{Mn^{2+}} is d5d^5 high spin with 5 unpaired electrons: μ=n(n+2)=35=5.92\mu = \sqrt{n(n+2)} = \sqrt{35} = 5.92 BM. Values near 2.8 and 3.9 BM correspond to two and three unpaired electrons.

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