Final answer:
Reactants are substances at the start of a chemical reaction, while products are substances formed by the reaction.
Explanation:
In a chemical reaction, the elements or compounds that initially participate are called reactants. These substances are found to the left of the arrow in a chemical equation. As the reaction progresses, new substances called products are formed and are located to the right of the arrow.
Learn more about Reactants and Products in Chemical Reactions here:
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