D-And F-Block Elements Ques 416
Question: The electronic configuration of chromium is
[BHU 2005; Pb. CET 2000]
Options:
A) $ [Ne]3s^{2}3p^{6}3d^{4},4s^{2} $
B) $ [Ne]3s^{2}3p^{6}3d^{5},4s^{1} $
C) $ [Ne]3s^{2}3p^{6}3d^{6},4s^{1} $
D) $ [Ne]3s^{2}3p^{5}3d^{5},4s^{2} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ Cr(Z=24) $ has electronic configuration $ 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{5}4s^{1} $ ( $ \because $ half filled d orbital is more stable than incompletely filled d orbital)
