Valence orbital ionization potentials from atomic spectral data

Average Energy of Configuration. Valence Orbital Ionization Potentials (VOIPs) are reported for the elements H through Kr in various configurations and for many states of ionization. For the lighter elements the isoelectronic series are fitted to a quadratic equation, VOIP (q)=Aq 2 + Bq+C. The significance of the A, B, and C parameters is discussed.