D-And F-Block Elements Ques 503

Question: Magnetic moment of Gd3+ ion (Z = 64) is

Options:

A) 3.62 BM

B) 9.72 BM

C) 7.9 BM

D) 10.60 BM

Show Answer

Answer:

Correct Answer: C

Solution:

Gd(64)=[Xe]4f75d16s2

Gd3+=[Xe],4f75d06s0 i.e. no. of unpaired electrons = 7

μ=n(n+2)=7(7+2)

=63=7.93BM



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