Unit1 Lesson 3

Question 1

Pauli exclusion principle

Answer 1

Each orbital can have a maximum of 2 electrons which have opposite spins
An orbital can have 0, 1 or 2 electrons
No 2 electrons can have the same set of quantum numbers

Question 2

Aufbau principal

Answer 2

When building an atom, electrons are added to the lowest energy level orbital first
Build from the nucleus out

Question 3

Hund’s rule

Answer 3

Single electrons with the same spin must occupy each equal energy orbital before additional electrons with opposite spins can occupy the same orbital