Biology / Bio 0139 · Atom · ~20 seconds

Van der Waals Interactions

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Van der Waals interactions are weak, brief attractions between molecules caused by temporary, shifting imbalances in their electron distribution.

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Even two nonpolar molecules passing close together experience a fleeting pull as their electrons momentarily bunch to one side.

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These interactions are far weaker and shorter-lived than a hydrogen bond, but across many contact points they can add up to real structural strength.