Dispersion Forces

Dispersion forces occur between any pair of atoms. Each atom behaves like an oscillating dipole generated by electrons moving in relation to the nucleus of the atom. In a pair of atoms, the dipole in an atom polarizes the opposing atom. As a result, the oscillators are coupled, giving rise to an attractive force between the atoms. The theory of the attractive interaction between atoms is attributed to London (34), and such forces are often called London forces, or dispersion forces. They are long-range forces, arising from attractive forces between atoms over an extended distance.

It was shown by London, following the appearance of quantum theory, that this relationship is also applicable to the dispersion energy between two nonpolar molecules due to polarization of the electron density in one molecule by charge fluctuation in the other. Except in highly polar materials, it is the sum of London dispersion forces that contributes most to the total van der Waals attraction between macroscopic bodies.

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Berry Boosters

Acai, Maqui And Many Other Popular Berries That Will Change Your Life And Health. Berries have been demonstrated to be some of the healthiest foods on the planet. Each month or so it seems fresh research is being brought out and new berries are being exposed and analyzed for their health giving attributes.

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