In contrast to a lot of other works that study the effect of the electrode material or solvent type on the interactions of ions with the electrode surface and solvent molecules, the present work shows the dependence of these interactions on the ion nature. The calculations carried out using theoretical models of adsorption and complex formation for ions showed that the energy of adsorption on the electrode or the energy of binding into a complex with the solvent depends on the energy of the ion valence orbital. Most of the obtained dependencies are close to linear and exponential types, in some cases the solution leads to volcano-shaped dependencies.