STANDARD Chemistry Magnetic Properties MCQ Question
The magnetic moment of a divalent ion in aqueous solution with atomic number 25 is
5.9 B.M.
2.9 B.M.
6.9 B.M.
9.9 B.M.
Correct Answer
Detailed Explanation
The electronic configuration of ion (25) is 1s²2s²2p⁶3s²3p⁶3d⁵4s². The number of unpaired electrons (n) is 5. The magnetic moment μ = √(n(n+2)) B.M. = √(5(5+2)) = √35 = 5.9 B.M.
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