Atomic Structure Question 412

Question: If the nitrogen atom had electronic configuration $ 1s^{7} $ it would have energy lower than that of the normal ground state configuration $ 1s^{2}2s^{2}2p^{3} $ because the electrons would be closer to the nucleus. Yet $ 1s^{7} $ is not observed. It violates

Options:

A) Heisenberg’s uncertainty principle

B) Hund’s rule

C) Pauli exclusion principle

D) Bohr postulate of stationary orbits

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Answer:

Correct Answer: C

Solution:

  • Not more than two electrons can be present in same atomic orbital. This is Pauli’s exclusion principle.


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