Chemical reactions

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Across
  1. 5. number in front of a compound in a chemical reaction used for balancing
  2. 10. compounds at the beginning of a chemical reaction
  3. 12. more particles means more reaction
  4. 14. Metal and oxygen reacting
  5. 16. bright visual effect of some chemical reactions
  6. 17. mass is ____________ over the course of a chemical reaction
Down
  1. 1. compounds at the end of a chemical reaction
  2. 2. number below an element symbol telling how many of that atom
  3. 3. when an ACID and BASE combine
  4. 4. measure of the heat change in a chemical reaction
  5. 6. Nuclei collide less energy produced
  6. 7. when you add numbers to make sure both sides have the same number of atoms
  7. 8. Nuclei split, most energy, possible chain reaction
  8. 9. what happens when you have a flame
  9. 11. burning produces light and heat
  10. 13. evidence of a chemical reaction that you smell with a waft
  11. 15. arrow in the middle of a chemical reaction