Across
- 6. a violet colored element
- 7. makes balloons float
- 9. has 1 proton
- 11. used in thermometers
- 13. bananas have a lot of this
- 15. used to make a coin that's worth $.05
- 16. used to make lights
- 17. salt has a lot of this
- 20. used for carbon-dating
Down
- 1. can be found in pools
- 2. the strongest metal
- 3. Named after Einstein
- 4. used in batteries
- 5. a very expensive metal
- 8. named after a dwarf planet
- 10. 78% of the earth's atmosphere
- 12. used as a common kitchen item
- 14. used for second place medals
- 18. used to breathe
- 19. a very toxic metal