D-And F-Block Elements Ques 316
Question: Which of the following is not an actinide
[DPMT 2005]
Options:
A) Curium
B) Californium
C) Uranium
D) Terbium
Show Answer
Answer:
Correct Answer: D
Solution:
Terbium is lanthanide as it belongs to $ 4f- $ series having configuration $ [Xe]4s^{9}6s^{2} $ .
However the remaining members belong to $ 5f- $ series (actinides).