Atomic Structure Question 207

Question: The correct ground state electronic configuration of chromium atom is

Options:

A) $ [Ar],3d^{5},4s^{1} $

B) $ [Ar],3d^{4}4s^{2} $

C) $ [AR]3d^{6}4s^{0} $

D) $ [Ar]4d^{5}4s^{1} $

Show Answer

Answer:

Correct Answer: A

Solution:

3d subshell filled with 5 electrons (half-filled) is more stable than that filled with 4 electrons. $ 1,,4s $ electrons jumps into $ 3d $ subshell for more sability.



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