van der Waals forces_chem

First lets know what is van der waals forces:

van der waals forces are very shorts-lived inter-molecular attractive forces which are belived to exist between all kind of atoms, molecules and ions when they are sufficiently close to each other.

second lets know what are the types of this van der waals forces:

types of van der waals forces:

1. Dipole-Dipole intraction
2. ion dipole interaction
3. Dipole-induced dipole interaction
4. Instantaneous dipole-induced dipole interactions.

Info need to be added Like **orgin of van der waals forces...