Across
- 5. north south
- 9. molecular ion
- 10. chemistry
- 11. theory
- 12. dial element
- 17. negative
- 18. healthy together
- 19. formula
- 20. one
Down
- 1. alone
- 2. opposite of polar
- 3. two
- 4. number
- 6. dots
- 7. three
- 8. strong together
- 13. strong
- 14. together energy
- 15. 8
- 16. two compound