Across
- 6. is usually associated with bones and chalk but is firm in it's pure form
- 7. Atomic symbol is Na
- 8. atomic symbol is Fe
- 10. is a pale yellow gas
- 12. this group has Helium and Neon
- 13. also known as the chalcogens
- 15. pennies are made of this metal
- 16. Gas that takes up 21% of the atmosphere
- 18. are in group 1 of the periodic table
- 19. the lightest metal
- 20. This element's atomic symbol is Al
- 21. these are the rows of the periodic table
Down
- 1. Atomic symbol is H and is 1
- 2. are in group 17 of the periodic table
- 3. are apart of group 15 of the periodic table
- 4. this group is sometimes called the
- 5. are in group 2 of the periodic table
- 9. Atomic number is 36
- 11. Atomic symbol is C
- 14. these are the columns of the periodic table
- 17. this element is used clock and watch