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  1. What is a Reactant? - ChemTalk

    A reactant is a chemical substance that is present at the start of a chemical reaction, and is changed as the chemical reaction proceeds. They could also be referred to as terms like …

  2. REACTANT Definition & Meaning - Merriam-Webster

    The meaning of REACTANT is a substance that enters into and is altered in the course of a chemical reaction.

  3. What Is a Reactant in Chemistry? - ThoughtCo

    Aug 10, 2019 · Reactants are the starting materials in a chemical reaction. Reactants undergo a chemical change in which chemical bonds are broken and new ones formed to make products. …

  4. REACTANT | English meaning - Cambridge Dictionary

    Molecules collide and react with each other to form products that can transform back into the initial reactant species.

  5. Reactant - Simple English Wikipedia, the free encyclopedia

    In chemistry, reactant is the term for the ingredients for a chemical reaction. [1] Reactants are changed into products by the reaction, and are written on the left side of a chemical equation.

  6. Reactant - definition of reactant by The Free Dictionary

    Define reactant. reactant synonyms, reactant pronunciation, reactant translation, English dictionary definition of reactant. n. A substance that is altered or incorporated into another …

  7. Reactant Definition - Intro to Chemistry Key Term | Fiveable

    Reactants are the initial substances present before a chemical reaction occurs, and they are consumed or transformed during the reaction. The number and types of reactants involved in a …

  8. Reactants and Products - Definition, Formulas ... - CK-12 …

    Dec 1, 2025 · In a chemical equation, reactants are located on the left side of the equation and are the substances that react with each other in a chemical reaction. The products are located …

  9. reactant noun - Definition, pictures, pronunciation and usage …

    a substance that takes part in and is changed by a chemical reaction. Definition of reactant noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example …

  10. Definition of reactants - Chemistry Dictionary

    Reactants are substances initially present in a chemical reaction that are consumed during the reaction to make products. Some chemical reactions go to completion, resulting in all of the …