CHEMICAL REACTIONS

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Across
  1. 2. states that atoms are not created or destroyed during a chemical reaction, they just rearrange
  2. 4. when a chemical reaction absorbs energy
  3. 5. describes how chemicals hit each other to cause a reaction
  4. 10. the minimum energy needed to start a reaction
  5. 12. the large numbers written in front of a formula to balance a chemical equation
  6. 13. a chemical that temporarily reacts to lower the activation energy so the reaction is faster
  7. 14. the higher the value, the faster the molecules move causing harder and more frequent collisions resulting in a faster reaction
  8. 15. describes how much chemical is present in a certain volume
Down
  1. 1. stating hydrogen + oxygen yields water
  2. 2. phase indicated in an equation by(l)
  3. 3. using element symbols and compound formulas to describe a chemical reaction
  4. 6. when a chemical reaction releases energy
  5. 7. phase indicated in an equation by(s)
  6. 8. the study of reaction rates
  7. 9. the materials that form from a reaction
  8. 11. the substances at the start of a reaction