A reactant is a substance that participates in a chemical reaction and is transformed into new products. It can be a solid, liquid, or gas.
Reactants combine with each other or with other substances to initiate a chemical reaction and generate changes in molecules.
They are like the ingredients of a recipe, as their presence and how they interact determine the final outcome of the reaction.
Reactants can be used in various processes, such as chemical synthesis, laboratory analysis, and many other applications in industry and scientific research.