MULTIPLE-CHOICE QUESTION What are the atoms of the left called? Products A seesaw Reactants

## Step 1In a chemical reaction, the substances that are present before the reaction takes place are called reactants. These reactants undergo a chemical change to form new substances, which are called products.## Step 2The question refers to the atoms on the left side of a chemical equation. In a chemical equation, the reactants are always written on the left side.## Step 3Therefore, the atoms on the left side of a chemical equation are called reactants.