Enthalpy electromagnetic interaction, the ionization potential and the enthalpy of cationic

The possibility of applying the model of the crystal lattice enthalpy to adequately calculate the enthalpy of formation ∆ fН°(Ме z+, g) and the ionization potential has been demonstrated; the cation radius is used. A division of Mendeleev periodic table in accordance with electronic structure of simple cations and anions has been proposed.