Across
- 2. matches
- 6. valuable metal
- 8. salt
- 9. Bright gas
- 10. heavy metal
- 11. liquid element
- 12. shiny metal
- 14. Reactive metal
- 16. soft metal
- 18. Prevents rust
- 20. radioactive
Down
- 1. green gas
- 3. rare metal
- 4. purple solid
- 5. Poison
- 7. yellow solid
- 13. light metal
- 15. Light metal
- 17. Breathing gas
- 19. blue metal