Specific examples are analyzed to substantiate the suggestion that the metr
ic characteristics of inert gas atoms in the solid, liquid, and gaseous sta
tes correlate with the de Broglie electronic wave lengths. The de Broglie w
aves whose length has been determined not only from the first but also from
the second and third ionization potentials are considered. The suggestion
is made that electronic shells can in certain instances behave as soft sphe
res that preserve their volumes under deformations.