WHY GASEOUS HELIUM DOES NOT HAVE LONDON FORCES?

Question

IN GASEOUS STATE WHAT IS SIZE OF ELECTRONIC CLOUD AND HOW LONDON FORCES ARE EFFECTED?

Answer 1

In actuality, gaseous He does exhibit London dispersion forces (van der Waals).  But many may not think so because it is monoatomic.  But even though it is a single atom, it does have 2 electrons, and sometimes these two electrons may find themselves on the same side of the atom, thus creating a fleeting, momentary dipole.  This is then what leads to London dispersion forces between the He atoms.