Question

What happens in a chemical reaction?

Answer 1

When two or more molecules interact and the molecules change. Bonds between atoms are broken down and created to form new molecules.

Answer 2

 As the chemical bonds are broken, the positions of electrons change, resulting in a product with properties that are different from the properties of the reactants. Various temperatures and catalysts are needed for different chemical reactions to occur. During a chemical reaction, new substances are produced as existing bonds are broken, atoms are rearranged, and new bonds are formed.