Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

In the reaction, the bonds in the methane and oxygen molecule come apart, the atoms rearrange and then re-bond to form water and carbon dioxide. The little number written at the lower right after an ...

and 6 oxygen atoms The chemical equation is balanced because the same type and number of atoms are in the reactants and products. Lesson 6.2: Controlling the Amount of Products in a Chemical Reaction ...