When filling degenerate orbitals, electrons fill them singly first, with parallel spins. What is this known as?
A) Pauli exclusion principle
B) Hund's rule
C) aufbau principle
D) Heisenberg uncertainty principle

Question

Quizplus · Accepted Answer

This is known as Hund's rule, which states that when filling degenerate orbitals, electrons fill them singly first, with parallel spins, before pairing up.

When Filling Degenerate Orbitals, Electrons Fill Them Singly First, with Parallel