Across
- 4. has 26 neutrons
- 6. found in bones
- 10. expands when it freezes like water
- 11. has 28 is its atomic #
- 13. symbol is CI
- 14. has an atomic # of 12
- 18. is the 4th element in the periodic table
- 19. is the 35 most common element on earth
- 21. has a natural state of a gas
Down
- 1. was discovered 2 times
- 2. georg brandit discovered it in 1735
- 3. has a high demand for fertilizer
- 5. has a very high melting point of 3769f
- 7. has 45 neutrons
- 8. is everywhere in your device
- 9. was discovered by pierre janssen
- 12. third lightest element in the halogen group
- 15. was discovered by william ramsay and john william
- 16. atomic symbol is ZN
- 17. horrig brand had discovered it in 2000BC
- 20. was discovered around 3500BC