Science 9 Unit B 3 & 4

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Across
  1. 2. CaO
  2. 3. Na3N
  3. 4. negatively charged ion
  4. 6. Fe + O2 --> Fe2O3
  5. 7. SO2
  6. 12. substances on the right side of the arrow
  7. 15. C6H12O6 + O2 --> CO2 + H2O
  8. 16. a reaction that takes in energy
  9. 19. CH4 + O2 --> CO2 +- H2O
  10. 20. when a solid forms after mixing two solutions
  11. 22. when a substance become aqueous
  12. 23. a compound made of a metal and a non-metal
  13. 25. SiO2
  14. 27. CH4
  15. 28. a reaction goes faster when temperature _________
Down
  1. 1. a reaction that releases energy
  2. 2. the amount of substance
  3. 5. O2F2
  4. 8. BaCl2
  5. 9. a substance that is not consumed, but makes a reaction go faster
  6. 10. molecular compounds tend to have ______ boiling points
  7. 11. a biological catalyst
  8. 13. positively charged ion
  9. 14. substances on the left side of the arrom
  10. 17. when an ionic compound breaks apart into ions in solution
  11. 18. a compound made of two or more non-metals
  12. 21. NH3
  13. 24. ionic compounds tend to have _______ boiling points
  14. 26. LiF