Question

Nitrogen has the electronic configuration

$1s^{2},2s^{2}2p_{x}^{1}2p_{y}^{1}2p_{z}^{1}$ and not $1s^{2},2s^{2}2p_{x}^{2}2p_{y}^{1}2p_{z}^{0}$

Which is determined by

• A. Aufbau's principle
• B. Pauli's exclusion principle
• C. Hund's rule
• D. Uncertainty principle

Answer 1

Answer: (C)

Hund's rule

Answer 2

Hund’s rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts when each of them is singly filled.