* Atoms: The fundamental building blocks of matter. They consist of a central nucleus containing protons (positively charged) and neutrons (neutral). Surrounding the nucleus is a cloud of electrons (negatively charged).

* Molecules: Two or more atoms held together by chemical bonds. Examples include water (H₂O), carbon dioxide (CO₂), and oxygen (O₂).

* Electrons: Tiny, negatively charged particles that orbit the nucleus of an atom. They determine an atom's chemical properties.

* Elements: Pure substances made up of only one type of atom. Examples include hydrogen (H), oxygen (O), and gold (Au).

* Protons: Positively charged particles found in the nucleus of an atom. They determine the element to which an atom belongs.

Here's how they fit together:

* Atoms are the basic building blocks.

* Electrons are a component of atoms.

* Protons are also a component of atoms.

* Elements are made up of a single type of atom.

* Molecules are formed when two or more atoms (of the same or different elements) bond together.

So, while atoms do include electrons and protons, they don't directly "include" molecules or elements. Elements are made of atoms, and molecules are made of atoms bonded together.