A molecule is the smallest particle in a chemical element or compound that contains the chemical properties of the element or compound. Molecules are made up of atoms. Anytime two atoms or more
join together, they make a molecule. This happens because of the sharing or exchange of electrons among atoms. Molecules are important to our life because the world is made of them, including yourself. You are made up of trillions and trillions of different types of molecules. If you know this information and you get sick it can help you and your doctors get information easier. If this atoms did´t bond together to form molecules, the world would be made out of just 90 substances, and many of them would be toxic!! Without molecules you would´t exist!! So you better learn about them!