Final answer:
The chemicals to the right of the arrow in a chemical reaction are called the products, while the chemicals to the left of the arrow are called the reactants.
Step-by-step explanation:
The substances to the right of the arrow in a chemical reaction are called the products. This is because they are the substances that are formed as a result of the reaction.
For example, in the equation: 2H2 + O2 → 2H2O, the water (H2O) is the product.
On the other hand, the substances to the left of the arrow are called the reactants. These are the substances that are present at the start of the reaction. In the example equation, the hydrogen (H2) and oxygen (O2) are the reactants.