Chemical Elements/Atoms – Atoms are the basis of everything, and we classify these in the periodic table. The periodic table is currently composed of 118 atoms. Each atom is differentiated by the protons in their atomic nuclei known as their atomic number. Identifying properties of atoms are atomic weight, density, and electronegativity.
Molecules – A molecule is a group of atoms either the same or of differing types connected together by energy, a chemical bond. A true molecule is one type of atom only and these molecules are joined together via a covalent bond.
Compounds – All compounds are also molecules, but not all molecules are compounds. Compounds are where multiple differing atom types become connected. The connection between differing atoms is made via an ionic bond. An iconic bond is formed via an electrostatic connection between oppositely charged ions. Due to the connection process of compounds, not all atom combinations can be created into a compound but all atoms can be present singularly and as a molecule.
