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} $ .



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