* Elements: The fundamental building blocks of matter. They cannot be broken down into simpler substances by chemical means. Examples include carbon, hydrogen, oxygen, nitrogen, etc.

* Atoms: The smallest unit of an element that retains the chemical properties of that element. They are made up of protons, neutrons, and electrons.

* Protons: Positively charged particles found in the nucleus of an atom.

* Electrons: Negatively charged particles that orbit the nucleus of an atom.

* Molecules: Two or more atoms chemically bonded together.

Therefore, elements encompass the others since:

* Atoms are made of protons and electrons.

* Molecules are formed by the bonding of atoms.

Let me know if you'd like more details on any of these terms!