Періодичність хімічних елементів у світлі сучасних фактів

Abstract

The paper is devoted to the investigation of periodicity of chemical elements in groups and periods. The literary and the modern experimental facts are adduced. For simple materials and chemical compounds (A2 IIISe3, GaBV, CuBIIISe2, AgBIIISe2) the periodicity are illustrated by some parameters (melting point, boiling point, density, first ionization potential, electric resistance, energy gap) and them differences. The quantum-mechanic models of cause of periodicity of elements in groups and periods are analyzed. The new terms are proposed.