The chemical substance formed as the result of a reaction is called a product.

Here's a simple breakdown:

* Reactants: The starting materials in a chemical reaction.

* Products: The substances formed as a result of the chemical reaction.

For example, in the reaction of sodium (Na) and chlorine (Cl), the product is sodium chloride (NaCl):

2 Na + Cl₂ → 2 NaCl

Here, sodium and chlorine are the reactants, and sodium chloride is the product.