Atomic Structure Question 360
Question: Aufbau principle is obeyed in which of the following electronic configurations [AFMC 1999]
Options:
A) $ 1s^{2}2s^{2}2p^{6} $
B) $ 1s^{2}3p^{3}3s^{2} $
C) $ 1s^{2}3s^{2}3p^{6} $
D) $ 1s^{2}2s^{2}3s^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
According to Aufbau principle electron are filling increasing order of energy. Therefore the electronic configuration $ 1s^{2},2s^{2},2p^{6} $ obeys Aufbau principle.
