Chemical Reactions

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Across
  1. 2. Number that tells you the amount of a certain atom in a chemical formula.
  2. 4. Substances that enters a chemical reaction.
  3. 6. Non-flammable gas that is less dense than air.
  4. 7. Substance that is produced from a chemical reaction.
  5. 11. Measurement that tells you how much space matter takes up.
  6. 13. Another word for when mass stays the same.
  7. 16. Property that describes how a substance interacts with fire.
  8. 17. You ... change the subscripts when you balance a chemical equation.
  9. 18. Property that you get when mass is divided by volume.
Down
  1. 1. Chemical reaction that releases heat.
  2. 3. Chemical reaction that absorbs energy from the surroundings.
  3. 5. Gas that makes up 78% of the air around us.
  4. 8. A molecule is made up of at least ... atoms.
  5. 9. Number that tells you the amount of molecules in a chemical formula.
  6. 10. Unit to measure temperature in Germany.
  7. 12. Flammable gas made up of one carbon and four hydrogen atoms.
  8. 14. Flammable gas that you get as a product when you run electricity through water.
  9. 15. Substance that creates carbon dioxide when reacting with water and citric acid.