5.3 Quantum Numbers, Atomic Orbitals, Electronic Configuration

Aufbau rule

• When filling orbitals, the lowest energy orbitals available are always filled first.

• No two electrons in the same orbital can have the same spin.

• When orbitals of equal energy are being filled, the most stable configuration is the one with the maximum number of unpaired electrons with the same spin.

Pauli Exclusion Principle

• When filling orbitals, the lowest energy orbitals available are always filled first.

• No two electrons in the same orbital can have the same spin.

• When orbitals of equal energy are being filled, the most stable configuration is the one with the maximum number of unpaired electrons with the same spin.

Hund’s Rule (for p,d,f)

• When filling orbitals, the lowest energy orbitals available are always filled first.

• No two electrons in the same orbital can have the same spin.

• When orbitals of equal energy are being filled, the most stable configuration is the one with the maximum number of unpaired electrons with the same spin.

• Aufbau Rule

• Pauli Exclusion Principle

• Hand’s Rule

• Aufbau Rule

• Pauli Exclusion Principle

• Hand’s Rule

• Aufbau Rule

• Pauli Exclusion Principle

• Hand’s Rule

Abbreviate only ___ cores/gas

NOBLE GAS NOTATION.

He

NOBLE GAS NOTATION.

Ne

NOBLE GAS NOTATION.

Kr