Question:
[Given atomic number of Cu = 29, Ni = 28,Mn = 25, Fe = 26]
[Given atomic number of Cu = 29, Ni = 28,Mn = 25, Fe = 26]
Updated On: Jan 13, 2026
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Correct Answer: 6
Solution and Explanation
The green bead indicates the presence of Fe3+. The number of unpaired electrons in Fe3+ is 5. The spin-only magnetic moment is given by:
\( \mu = \sqrt{n(n + 2)} \, \text{BM} \)
Substituting \( n = 5 \):
\( \mu = \sqrt{5(5 + 2)} = \sqrt{35} \approx 5.92 \, \text{BM} \)
Nearest integer = 6.
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