Periodic table

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