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 $
