Across
- 3. atomic number 44
- 8. earth natural causes
- 11. striaght line
- 12. periodic element
- 13. atomic number 11
- 14. a chemical element with the letter c
- 15. quickly decays
- 17. noble gas
- 18. atomic number 2
- 19. group 10
- 22. atomic numbe (z)
Down
- 1. atomic number 99
- 2. atomic number 74
- 4. type of stone
- 5. rare and hard
- 6. motion
- 7. uses periodic table
- 9. sliver element
- 10. holds motion
- 16. number 49
- 20. kinetic
- 21. number