Across
- 1. Element abbreviated as Cl
- 6. Element abbreviated as Ca
- 7. Element abbreviated as S
- 8. Element abbreviated as K
- 10. Element abbreviated as Mg
- 14. Element abbreviated as Ne
- 15. Element abbreviated as H
- 17. Element abbreviated as F
- 19. Element abbreviated as O
- 20. Element abbreviated as Na
Down
- 2. Element abbreviated as Li
- 3. Element abbreviated as Be
- 4. Element abbreviated as He
- 5. Element abbreviated as C
- 9. Element abbreviated as Al
- 11. Element abbreviated as Si
- 12. Element abbreviated as P
- 13. Element abbreviated as N
- 16. Element abbreviated as Ar
- 18. Element abbreviated as B