Chemistry-Transition Elements
NEET Chemistry Transition Elements MCQ Question
Type: MCQ-numerical-Medium-Class 12
Calculate the ‘spin only’ magnetic moment of Co 2+ (aq) ion using the data given for first row transition metals.
A
3.87 BM
B
4.90 BM
C
2.83 BM
D
5.92 BM
Correct Answer
Option A
Detailed Explanation
Co 2+ has a 3d7 configuration, which means it has 3 unpaired electrons. The formula for spin only magnetic moment is μ = √(n(n+2)), where n is the number of unpaired electrons. This gives μ = √(3(3+2)) = √15 = 3.87 BM.
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