Chemistry is the study of all matter.

Everything is made of chemistry.

The atom is the smallest building block of matter.

Protons, neutrons, electrons, and the nucleus are all subatomic particles within the atom.

Atoms make up molecules.

Molecules make up elements.

Elements make up everything we see, touch, taste, smell, hear, and even the things we cannot see, touch, taste, smell, and hear.

Elements are combined to form new substances.
ex: Na + Cl = NaCl
Sodium + Chlorine = Sodium Chloride.