Electron spectra and structure of simple molecules and isolated groups of nontransition elements

Electron structure of simple molecules and isolated groups of nontransition elements was considered on the basis of data on photo-, X-ray electron and X-ray spectroscopy, published till 1986. Regularities of changes of ionization energy and orbital energies of atoms of nontransition and transition elements, as well as molecules of hydrides, halides, chalcogenide, halides of alkaline and alkaline earth elements, elements of the 3d, 4th and 6th groups of the periodic system, rare gases were analyzed