Atomic Structure Question 297
Question: Which of the following electronic configurations is not possible [CPMT 2000]
Options:
A) $ 1s^{2}2s^{2} $
B) $ 1s^{2}2s^{2}2p^{6} $
C) $ 3d^{10}4s^{2}4p^{2} $
D) $ 1s^{2}2s^{2},2p^{2}3s^{1} $
Show Answer
Answer:
Correct Answer: D
Solution:
When 2p orbital is completely filled then electron enter in the 3s. The capacity of 2p orbital containing $ {e^{-}} $ is 6. So $ 1s^{2},,2s^{2}2p^{2}3s^{1} $ is a wrong electronic configuration the write is $ 1s^{2}2s^{2}2p^{3}. $
