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CBSE Class 12 Chemistry 2025 All Sets Solved Paper

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Question : 2 of 16
Marks: +1, -0
The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr3+ ion (Atomic number : Cr = 24) is ____.
Solution:  
µ , spin angular momentum = (n)n+2. B.M. Electronic configuration of Cr3+=[Ar] 3d3
Number of unpaired electrons = 3
µ=3×5=15=3.87 B.M.
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