The noticed disparity in freezing factors between xenon and helium, each noble gases, stems primarily from the energy of their intermolecular forces. Helium, being a really small and lightweight atom, displays exceptionally weak London dispersion forces. These forces come up from short-term fluctuations in electron distribution, creating transient dipoles that induce dipoles in neighboring atoms. The feeble nature of those interactions interprets to a remarkably low freezing level.
Xenon, in distinction, possesses a considerably bigger atomic dimension and a higher variety of electrons. This bigger electron cloud makes xenon much more polarizable. Consequently, the short-term dipoles fashioned are extra pronounced, resulting in stronger London dispersion forces between xenon atoms. The elevated energy of those engaging forces necessitates a decrease temperature to beat them and transition from a liquid to a stable state. This highlights the direct relationship between atomic dimension, polarizability, intermolecular forces, and freezing level.
