- https://en.wikipedia.org/wiki/Atom
- https://en.wikipedia.org/wiki/Periodic_table
- https://en.wikipedia.org/wiki/Solubility
- https://en.wikipedia.org/wiki/Acid%E2%80%93base_reaction
- https://en.wikipedia.org/wiki/Chemical_bond
- https://en.wikipedia.org/wiki/Quantum_chemistry
- https://en.wikipedia.org/wiki/Quantum_number
- https://en.wikipedia.org/wiki/Significant_figures
- https://en.wikipedia.org/wiki/Mole_(unit)
- https://www.khanacademy.org/test-prep/mcat/chemical-processes/covalent-bonds/a/intramolecular-and-intermolecular-forces
- https://www.chem.purdue.edu/gchelp/atoms/states.html
- https://www.chem4kids.com/files/matter_states.html
- https://www.youtube.com/watch?v=EMDrb2LqL7E
- https://www.youtube.com/watch?v=O9Goyscbazk
- https://www.youtube.com/watch?v=0qKrOF-gJZ4
- https://www.youtube.com/watch?v=7DjsD7Hcd9U
- Orbitals, the Basics: Atomic Orbital Tutorial — probability, shapes, energy; Crash Chemistry Academy
- Introduction to Atomic Structure
- Cathode Ray Tube
- The photo-electric effect explained
- Chemical Bonds: Covalent vs. Ionic
- Orbitals, the Basics: Atomic Orbital Tutorial — probability, shapes, energy; Crash Chemistry Academy