Only two electrons, with opposing spins, are allowed in each orbital. 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 the Pauli exclusion principle, which states that no two electrons in an atom can have the same set of four quantum numbers, and thus only two electrons with opposing spins can occupy each orbital.

Only Two Electrons, with Opposing Spins, Are Allowed in Each