Ionization Energies; Electron Affinities (Sections)f the

Elementary Chemistry Ch 4.3­4.8 4.3 Quantum Numbers  Each electron in an atom is associated with a set of four Quantum Numbers  Principle Quantum Number (n): o Any positive integral value  Most stable atoms have values from 1­7  Ground State: most stable electronic state of an atom  Excited State: any state higher than the ground state  Angular Momentum Quantum Number (ℓ): o Electrons have values from zero ­ (n­1)  Cannot be as large as n o Small role in determining the energy of the electron o Determines the shape of the volume of space that the electron can occupy  Magnetic Quantum Number (m ): e