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Permanent dipole-dipole interactions

OCR AS-level ChemistryShapes and Intermolecular ForcesLesson 10 of 13

If you compare fluorine molecules F-F with H-Cl molecules, the molecules have the same shape and number of electrons.
Fluorine molecules are non-polar and hydrogen chloride molecules are polar.

Diagram

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Key terms in this lesson

Dipole
A separation of opposite partial charges caused by an uneven distribution of the bonding electron pair.
London forces
Weak intermolecular forces caused by an instantaneous dipole inducing a dipole in a neighbouring molecule.

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