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Question: Answered & Verified by Expert
Aufbau principle is obeyed in which of the following electronic configurations
ChemistryStructure of AtomJEE Main
Options:
  • A $1 s^2 2 s^2 2 p^6$
  • B $1 s^2 3 p^3 3 s^2$
  • C $1 s^2 3 s^2 3 p^6$
  • D $1 s^2 2 s^2 3 s^2$
Solution:
2559 Upvotes Verified Answer
The correct answer is: $1 s^2 2 s^2 2 p^6$
According to Aufbau principle electron are filling increasing order of energy. Therefore the electronic configuration $1 s^2 2 s^2 2 p^6$ obeys Aufbau principle.

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