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Which is the best description of a molecule?
A molecule of an element is composed of at least two types of atoms.
A molecule of a compound is composed of only one atom.
A molecule of a compound is composed of at least two atoms.
A molecule of an element is composed of exactly two types of atoms.



Answer :

Final answer:

A molecule is the smallest unit of a chemical compound, consisting of two or more different types of atoms bonded together.


Explanation:

A molecule is the smallest unit of a chemical compound and is composed of two or more different kinds of atoms chemically bonded together. For example, a molecule of water always contains one oxygen atom and two hydrogen atoms, with a chemical formula of H₂O.


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