Most people think that a chemical reaction is when something bubbles, explodes, changes color, odor, or temprature, but this in not true. The things listed above are signs of a chemical reaction, not what really happens. A chemical reaction is a process in which one or more substances are changed into one or more new substances. This happens when an electron joins an empty slot on the atom’s valence ring, or leaves an atom to join an empty slot on another atom’s valence ring.

Here is an example of a chemical reaction. This video shows what happens when you put a sucrose in potassium cholride.