Although Cr 3+ and Co 2+ ions have the same number of unpaired electrons, the magnetic moment of Cr 3+ is 3.87 B.M. and that of Co 2+ is 4.87 B.M. Why?

Question

Although Cr 3+ and Co 2+ ions have the same number of unpaired electrons, the magnetic moment of Cr 3+ is 3.87 B.M. and that of Co 2+ is 4.87 B.M. Why?, Cr 3+ has a higher nuclear charge than Co 2+ ., Co 2+ has a higher spin multiplicity than Cr 3+ ., Co 2+ has a larger ionic radius than Cr 3+ ., Cr 3+ has a more stable electronic configuration.

MARKS App · Accepted Answer

Correct Option is : (C) Co 2+ has a larger ionic radius than Cr 3+ .

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