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  4. The magnetic moment of Ni2+ ion (At. No. of Ni. is 28) in BM unit is

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Q. The magnetic moment of $Ni^{2+}$ ion (At. No. of Ni. is 28) in BM unit is

KEAMKEAM 2014The d-and f-Block Elements

Solution:

The number of unpaired electrons in $N i^{2+}(a q)=2$ Water is weak ligand hence no pairing will take place spin magnetic moment $=\sqrt{n(n+2)}=\sqrt{2(2+2)}=\sqrt{8}=2.82$