Van der Waals forces. Van der Waals forces are very weak forces between two very close surfaces.
Forces of van der Waals. When two surfaces are very close to one another, van der Waals forces are very weak.
In gases, liquefied and solidified gases, and nearly all organic liquids and solids, neutral molecules are drawn to one another by van der Waals forces, which are relatively weak electric forces.
Van der Waals interactions are nonionic forces that have a comparatively low energy of 0.5 to 1 kcal/mol.
The covalent link from its less electronegative Neighbour atom tends to drive the electron cloud toward neutral molecules with electronegative atoms like oxygen and nitrogen.
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