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London dispersion is the weakest interatomic force. It relies on the motion of electrons to form a momentary (temporary) multipole in one atom, and induce a momentary multipole on nearby atoms. It is extremely distance sensitive (the energy of the attraction is inversely proportional to the distance between the particles to the sixth power) and is the weakest attractive force in most circumstances.

Despite its apparent weakness, London dispersion can be powerful when occurring in large numbers and/or at very small radii. For example, Tokay Gecko feet have many very small protrusions sticking out of them that cause London dispersion interactions between them and the surface. This allows geckos to climb up nearly any surface at any angle.

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