D-And F-Block Elements Ques 509
Question: In which of the following lanthanoids oxidation state +2 is most stable-
Options:
A) Ce
B) Eu
C) Tb
D) Dy
Show Answer
Answer:
Correct Answer: B
Solution:
$ E{{u}^{2+}} $ has electronic configuration $ [ Xe ]4f^{7} $ hence stable due to half-filled atomic orbitals.