In this video, we're going to begin our lesson on chemical reactions. And so, chemical reactions consist of the making and/or breaking of chemical bonds, leading to changes in matter, and every single chemical reaction has reactants and products. Now reactants are going to be the starting material in a chemical reaction, and so you can think of the reactants as the ingredients for the reaction. And then, of course, the products are going to be the ending material in a reaction. And so let's take a look at our image down below, which notice is showing a chemical reaction.
On the left-hand side, notice that we have these building blocks that are broken apart into smaller individual pieces, they're broken down. And on the right, notice that the building blocks are coming together to build a larger, more complex structure. And so the beginning of every chemical reaction is going to start off with reactants. And so reactants are going to be once again the starting material in a chemical reaction. And over here, on the right-hand side, what we have is the ending material.
And so the ending material is going to be the products. And so every chemical reaction is going to have reactants and a product, and the reactant is always going to be found at the very beginning of a chemical reaction arrow and the product is going to be found at the very end of a chemical reaction arrow. And so we'll be able to talk about different types of chemical reactions as we move forward in our course, but for now, this concludes our introduction to chemical reactions as well as the difference between reactants and products, and we'll be able to get practice as we move forward through our course. So I'll see you all in our next video.