2ND QUARTER

• Principal Quantum Number - describes the size and distance of electrons from the nucleus. It also indicates the energy of the electrons
• Azimuthal Quantum Number - describes the shape of the orbitals and has values from zero to n-1
• Magnetic Quantum Number - describes the orientation on space of the orbitals and has values from -1 to +1, including zero
• Spin Quantum Number - describes the direction of spin of the electrons
• Pauli’s exclusion principle - no two electrons in an atom will have the same set of all four quantum numbers