State the following laws: 1. Pauli's Exclusion Principle 2. Aufbau Building Principle 3. Hund's Rule of Maximum Multiplicity

1. Pauli's Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers.
2. Aufbau Building Principle states that electrons fill orbitals in order of increasing energy, starting with the lowest energy orbital.
3. Hund's Rule of Maximum Multiplicity states that electrons will occupy orbitals singly before pairing up, and when they do pair up, they will have parallel spins.

1. Pauli's Exclusion Principle:
No two electrons in an atom can have the same set of four quantum numbers.

2. Aufbau Building Principle:
Electrons fill atomic orbitals of the lowest available energy level first.

3. Hund's Rule of Maximum Multiplicity:
In an atom, electrons within a subshell occupy the maximum number of orbitals with the same spin before pairing occurs.