Question

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 type of atom.
A molecule of a compound is composed of at least two types of atoms.
A molecule of an element is composed of exactly two types of atoms.

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Answer 1

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A molecule of an element is composed of exactly two types of atoms.

Answer 2

Answer:

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