  We propose a simple method for calculating the metal vapor conductivity at
the critical point and near-critical isotherms. This method's base is the
hypothesis of an electron jellium's existence as an origin of the conduction
band in metal vapor's gaseous phase. Satisfactory agreement with the
experimental data for alkali metals (Cs, Rb) concludes that the "cold
ionization" mechanism is possible in the critical point's vicinity. The liquid
metal-dielectric transition, as previously thought, does not occur; but the
liquid metal-gaseous metal transition occurs probably. The gaseous metal is not
a dielectric state of the metal.
