Remember about the force between non-polar molecules, for example argon. The element of argon consists of atom, we call as a monoatomic molecule. In argon atom, there is also an intermolecular force, but this force is really very weak because this atom has no dipole moment. The temporary dipoles are only occurred very rare compare with diatomic molecules, as happened in iodine, I2 molecules.Now, what would happen if we mixed HCl with argon? The electrons on an argon atom are distributed homogeneously around the nucleus of the atom. When an argon atom comes close to a polar HCl molecule, the electrons can shift to one side of the nucleus to produce a very small dipole moment that occurredin a fraction of time. This is very weak temporary dipoles.
According to this evidence, by distorting the distribution of electrons around the argon atom, the polar HCl molecule induces a small dipole moment on this atom, which creates a weak dipole-induced dipole force of attraction between the HCl molecule and the Ar atom.
According to this evidence, by distorting the distribution of electrons around the argon atom, the polar HCl molecule induces a small dipole moment on this atom, which creates a weak dipole-induced dipole force of attraction between the HCl molecule and the Ar atom.
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