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Question

Which of the following metallic ions have the same magnetic moment?

A
Cr3+
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B
Mn2+
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C
Cr2+
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D
Co2+
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Solution

The correct option is D Co2+

Cr3+ has 3 unpaired electrons,
Magnetic moment = 3.87 BM.
Mn2+ has 5 unpaired electrons,
Magnetic moment = 5.91 BM.
Cr2+ has 4 unpaired electrons,
Magnetic moment = 4.89 BM.
Co2+ has 3 unpaired electrons,
Magnetic moment = 3.87 BM.

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