Posted by Anonymous on Wednesday, December 12, 2012 at 12:09am.
London dispersion force is a weak intermolecular force between two atoms or molecules in close proximity of each other. The force is a quantum force generated by electron repulsion between the electron clouds of two atoms or molecules as they approach each other.
The London dispersion force is the weakest of the van der Waals forces and is the force that causes nonpolar atoms or molecules to condense into liquids or solids as temperature is lowered.
dipole-dipole:
Intermolecular forces that exist between polar molecules . It is active only when the molecules are close together. The strengths of intermolecular attractions increase when polarity increases.
hydrogen bonding
Interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces
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