Question

When adding electrons to a level,sublevel, or orbital there are three rules that need to be followed. Choose the correct definition for each rule.

Answer 1

Aufbau Principle: Electrons occupy orbitals of lower energy first.

Pauli Exclusion Principle: An orbital can hold only two electrons and they must have opposite spin.

Hund's Rule: Electrons fill each orbital singly before any orbital gets a second electron.