Question

If the nitrogen atom had electronic configuration 1s7
, it would have energy lower than that of the normal
ground state configuration 1s2
2s2
2p3
, because the electrons would be closer to the nucleus. Yet 1s7
is
not observed. It violates
(A) Heisenberg’s uncertainty principle (B) Hund’s rule
(C) Pauli exclusion principle (D) Aufbau rule

Answer 1

Answer:

D aufbau principal bcz its doesnt obeys when electronic configuration wrong