Atomic Structure Result Question 20-1
20. If the nitrogen atom had electronic configuration $1 s^7$, it would have energy lower than that of the normal ground state configuration $1 s^2 2 s^2 2 p^3$, because the electrons would be closer to the nucleus, yet $1 s^7$ is not observed, because it violates
(2002, 3M)
(a) Heisenberg uncertainty principle
(b) Hund’s rule
(c) Pauli exclusion principle
(d) Bohr postulate of stationary orbits
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Answer:
Correct Answer: 20. ( c )
Solution:
- $1 s^7$ violate Pauli exclusion principle, according to which an orbital cannot have more than two electrons.
BETA
