D And F Block Elements Question 285
Ce-58 is a member of the lanthanide series
[Pb. CET 2002]
Options:
A) s-block
B) p-block elements
C) d-block
D) f-block elements
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^{1},5s^{2}5p^{6}5d^{1},6s^{2} $ Since, its last electron enter in f- sub-shell, therefore it is a member of f-block.
BETA
