The law of conservation of matter, also known as the law of conservation of mass, states that matter cannot be created or destroyed in a chemical reaction. In a closed system, the total mass of the reactants must be equal to the total mass of the products. This means that the total number and types of atoms before and after the reaction remain the same, although they may rearrange to form different compounds or molecules. In simpler terms, matter is neither created nor destroyed, but it can transform from one form to another.
