Reactants are the starting substances that undergo chemical changes in a reaction. They are present before the reaction begins and are transformed into products.
5 Must Know Facts For Your Next Test
Reactants are consumed during a chemical reaction.
The amount of reactants determines the quantity of products formed.
Reactants can be elements, compounds, or molecules.
In a balanced chemical equation, reactants are listed on the left side.
The rate at which reactants are used up can affect the speed of the reaction.
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Related terms
Products: Substances formed as a result of a chemical reaction.
Catalyst: A substance that speeds up a chemical reaction without being consumed.
Activation Energy: The minimum energy required for a chemical reaction to occur.