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27.21: U

Difficulty Level: At Grade Created by: CK-12
unit cell
The smallest portion of a crystal lattice that shows the three-dimensional pattern of the entire crystal.
unsaturated fat
A fat that consists of triglycerides whose carbon chains contain one or more carbon-carbon double bonds.
unsaturated hydrocarbon
A hydrocarbon that contains less than the maximum number of hydrogen atoms that can possibly bond with the number of carbon atoms present.

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