In chemical reactions, reactants are substances which form products in a reaction and the number of molecules are balanced on both sides at the end of the reaction.
Reactants are the molecules or substances, that are present at the start of the chemical reaction.
They are usually written on the left-hand side of the equation.
Products are substances that are present at the end of the chemical reaction.
They are generally written on the right-hand side of the equation.
A generic chemical reaction can be written:
In this reaction, A and B are the reactants and C is the product .
In a balanced equation, the number of elements on the product side of the reaction is equal to the number of elements on the reactant side.
Therefore, reactants are substances which form products in a reaction and the number of molecules are balanced on both sides at the end of the reaction.
Learn more about reactants and products at: https://brainly.com/question/2348108