A new electronegativity scale. 8. Correlation of the ionization potentials of the main-group atoms (I-VII)

Linear correlations are found to exist between the ionization potentials of the seven main-group elements (I-VII) and four different measures of their electronegativity. The electronegativity scales tested are the Pauling scale, {chi}{sub p}, a modification {chi}{sub p}{sup 2}, the Allred-Rochow scale, {chi}{sub A}, and our recently proposed scale V{sub X}. The latter gives a fit for all main-group elements with an average deviation of 0.14 eV and a root-mean-square deviation of 0.16 eV. The other three scales give fits that show larger deviations by factors of about 2. The maximum deviation with V{sub X} are 0.45 and 0.35 eV for Bi and Pb, respectively. These along with Tl may show anomalies relative to the lighter elements. By use of correlations, estimates are made of the covalent radii of Ra and Po and the IP of Fr and At.