______ are the smallest unit of matter that can take part in a chemical reaction.
A
Molecules
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B
Compounds
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C
Atoms
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D
Electrons
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Solution
The correct option is D Atoms Dalton's atomic theory states that atoms are the smallest unit of matter that can participate in a chemical reaction. Chemical reactions involve the combination, separation, or rearrangement of atoms, but atoms are neither created, destroyed, divided into parts, or converted into atoms of any other kind.