Respuesta :
A chemical reaction happens when the atoms or molecules rearrange to form a new substance
Explanation:
A reaction that bring changes in the chemical composition of its reactants then it is known as chemical reaction.
For example, [tex]C + O_{2} \rightarrow CO_{2}[/tex]
When carbon and oxygen combine together then properties of both carbon and oxygen changes. Whereas properties of carbon dioxide is different from carbon and oxygen atom.