Chemical Reaction crossword

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Across
  1. 2. consisting of one atom
  2. 4. a pure substance
  3. 6. relating to or consisting of molecules
  4. 9. (of a letter, figure, or symbol) written or printed below the line
  5. 12. atoms cannot be created or destroyed in a chemical reaction
  6. 15. atoms that are further apart and can slide past each other
  7. 16. dull, and right side of the staircase
  8. 18. the process of burning something
  9. 19. a process that involves rearrangement of the molecular or ionic structure of a substance
Down
  1. 1. dissolvable on water
  2. 3. a multiplier or factor that measures some property
  3. 5. symbolic representation of a chemical reaction in the form of symbols and formulae
  4. 7. atoms that are far apart and barely touch each other
  5. 8. two or more types of elements combined chemically
  6. 10. shiny, and on the left side of the staircase
  7. 11. what comes out from a reaction
  8. 13. atoms close together and cannot move apart
  9. 14. what goes into a reaction
  10. 17. consisting of two atoms
  11. 19. helps speed up chemical reactions