A crystalline solid has long-range order. In other words, its atoms or molecules lie in an orderly arrangement that is repeated over long distances. When the crystal melts, that long-range order is lost. In the liquid, the kinetic energy of the molecules can partly overcome the intermolecular forces, and so the molecules are able to move past one another.
—from Chemical Principles - The Quest for Insight, a book by Peter Atkins
Active since July 1, 2021.
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