Across
- 3. Element number 4
- 5. Used to keep pools clean (Cl)
- 7. Element with 6 protons
- 9. Superman's home planet
- 11. P
- 15. Used to make wires (Cu)
- 16. Thin foil used for cooking (Al)
- 18. Thing we breathe
- 20. Used to clean your teeth (F)
Down
- 1. Na
- 2. 12th Element
- 4. Album By Nirvana (Li)
- 6. Only one electron
- 8. Used in Neon signs
- 10. K
- 12. Smelliest Element (Pu)
- 13. The first Noble Gas
- 14. 2nd place medal
- 17. Chemical symbol Fe
- 19. Used as a form of currency