What are atoms?

All matter (anything with mass, so basically everything except for light/energy) is made of atoms. They are the basic building blocks that make everything up. What makes one material different from another? It's the atoms and how they are arranged. How small is an atom (hint: pretty tiny--you can't see them)? Check out this video to learn about atoms.

Atoms are the basis of chemistry. They also play a major role in physics. We frequently talk about atoms in our research all the time. Atoms are cool!