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).



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