D-And F-Block Elements Ques 517
Question: The reason for the stability of $ G{{d}^{3+}} $ ion is
Options:
A) 4f subshell - half filled.
B) 4f subshell - completely filled.
C) Possesses the general electronic configuration of noble gases.
D) 4f-subshell empty.
Show Answer
Answer:
Correct Answer: A
Solution:
$ Gd(Z=64)\Rightarrow 4f^{7}5d^{1}6s^{2} $ $ G{{d}^{3+}}=4f^{7} $ $ G{{d}^{3+}} $ is stable due to the presence of exactly half-filled 4f-subshell.
