Zackery's Crossword Puzzel

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Across
  1. 1. are tiny hair like stricter
  2. 2. break or shatter easily
  3. 3. having a shiny surface of reflecting light brightly
  4. 5. is a tiny particle but bigger than bacteria
  5. 7. are composed of two or more different substance
  6. 9. symbol H
  7. 10. ability to be drawn into a wire
  8. 11. ability to be hammered into different shapes
  9. 12. heat and electricity do not move through them easily
  10. 14. are composed of more than one element
  11. 17. is a long whip like structure
  12. 18. heat and electricity move though them easier
  13. 19. pure substance
Down
  1. 1. atomic number 17
  2. 4. heavy for their size
  3. 6. symbol NA
  4. 8. not shiny
  5. 13. is the number that comes before the chemical formula
  6. 15. are pure substances that cannot be changed
  7. 16. H2O