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Molecule
01
the smallest structure of a substance consisting of a group of atoms
02
(nontechnical usage) a tiny piece of anything
Example
Molecules are made up of two or more atoms bonded together.
The structure of a molecule determines its properties and behavior.
Some molecules are simple, like oxygen, which is made of two oxygen atoms.
Chemical reactions often involve the breaking and forming of molecules.
Larger molecules, like proteins, play important roles in living organisms.
