Here's why:
* Air is a mixture of gases: The air we breathe is a mixture of different gases, primarily nitrogen (N2), oxygen (O2), and smaller amounts of argon (Ar), carbon dioxide (CO2), and other gases.
* Gases are made of molecules: These gases are composed of molecules, which are simply two or more atoms bonded together.
* Molecules are made of atoms: So, the nitrogen gas in the air consists of nitrogen atoms bonded together in pairs, the oxygen gas has oxygen atoms paired, and so on.
Therefore, every component of air, including the gases we breathe, is made up of atoms.
