D-And F-Block Elements Ques 418

Question: Ce-58 is a member of

[Pb. CET 2002]

Options:

A) s-block

B) p-block

C) d-block

D) f-block

Show Answer

Answer:

Correct Answer: D

Solution:

$ Ce-58 $ have configuration $ 1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{10}, $ $ 4s^{2}4p^{6}4d^{10}4f^{2},5s^{2}5p^{6}5d^{0},6s^{2} $ Since, its last electron enter in f- sub-shell, therefore it is a member of f-block.



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