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Question

The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is (nearest integer)

JEE MAINS 2021

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Solution

The element having atomic no. 29 is copper
The electronic configuration of Cu2+ is
Cu2+ : [Ar] 3d9

It has 1 unpaired electron


μ=(n(n+2)=3=1.73 BM=2(nearestinteger)

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