Across
- 4. american five cent piece
- 6. metal that burns very brightly
- 9. sounds like a European country
- 11. precious metal
- 12. need for teeth and bones
- 15. found in bananas
- 16. Zn
- 17. most of the atmosphere
- 19. radioactive
- 22. bright city lights
Down
- 1. lighter than air, explosive gas
- 2. precious metal
- 3. lighter than air, non flammable gas
- 5. large sales of music
- 7. a very famous scientist
- 8. what this crossword is about
- 10. poisonous gas
- 13. conducts electricity well
- 14. makes diamonds and pencil leads (graphite)
- 18. we need this gas to survive
- 20. what you do with wrinkled clothes
- 21. Sn