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Calculate the 'spin only' magnetic momen...

Calculate the 'spin only' magnetic moment of `Fe_(aq)^(2+)` ion.

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Fe (26) Electronic configuration ` [ Ar] 3 d^(2) . 4s^(2)`
` Fe^(2+)` Electronic configuration is `[Ar] 3 d^(6)`
No of unpaired electrons is 4
Spin only formula ` mu = sqrt( n ( n + 2)) = sqrt( 4 xx 6) = sqrt( 24)` = 4 . 9 BM
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