Chemistry

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Across
  1. 3. chemicals that contain the benzene ring
  2. 5. a sweet smelling gas that is used to make plastics
  3. 6. inorganic compounds of fluorine added to toothpastes
  4. 8. compound of oxygen and another element
  5. 9. contains 6 carbon atoms in a ring
Down
  1. 1. compounds containing chlorine and another element
  2. 2. compounds that react with acids to give off carbon dioxide
  3. 4. an alcohol
  4. 7. a group of compounds made by cracking