D-And F-Block Elements Ques 298
Question: The valence shell electronic configuration of $ C{{r}^{2+}} $ ion is
[Orissa JEE 2005]
Options:
A) $ 4s^{o}3d^{4} $
B) $ 4s^{2}3d^{2} $
C) $ 4s^{2}3d^{0} $
D) $ 3p^{6}4s^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
Electronic configuration of chromium $ Cr\to [Ar],3d^{5}4s^{1} $
$ C{{r}^{2+}}\to [Ar]3d^{4}4s^{0} $ .
