D-And F-Block Elements Ques 503

Question: Magnetic moment of $ G{{d}^{3+}} $ 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 ]4f^{7}5d^{1}6s^{2} $

$ G{{d}^{3+}}=[Xe],4f^{7}5d^{0}6s^{0} $ i.e. no. of unpaired electrons = 7

$ \mu =\sqrt{n(n+2)}=\sqrt{7(7+2)} $

$ =\sqrt{63}=7.93BM $



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