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Question

Calculate the spin only magnetic moment of Fe2+.[ At. no. = 26]

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Solution

Electronic configuration of Fe+2=1s22s22p63s23p63d6
It has 4 unpired electrons.
As we know that
Magnetic moment (μ)=n(n+2)
whereas n is the no. of unpaired electrons
μ=4(4+2)
μ=4×65BM

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