reactant
Pronunciation
Noun
B1 Intermediate
Quick answer
A substance that takes part in and is changed by a chemical reaction.
Synonyms and antonyms
Antonyms
Usage notes
In a balanced chemical equation, the total mass of reactants always equals the total mass of products.
Test yourself
Which word fits the gap? "In the reaction, hydrogen and oxygen are the _____, and water is the product."
Answer: reactant
In your own words, what does "reactant" mean?
A substance that takes part in and is changed by a chemical reaction.
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