Q.

Which one of the following shows highest magnetic moment?

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a

V3+

b

Cr3+

c

Fe3+

d

Co3+

answer is C.

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Detailed Solution

Ar183d6(a) Valence shell electron configuration of V3+ is Ar183d2; so n = 2(b) Valence shell electron configuration of Cr3+ is Ar183d3; so n = 3(c) Valence shell electron configuration of Fe3+[Ar]18 3d5  ;so n =5(d) Valence shell electron configuration of Co3+ is ; Ar183d6 ;so n=4
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