Chemical Reaction Rates

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Across
  1. 7. The minimum energy needed to start a reaction
  2. 9. More of this exposed area makes reactions faster
  3. 11. A biological catalyst
  4. 12. A weak mixture with fewer particles
  5. 13. A small‑size form that reacts quickly
  6. 14. The total area exposed for reacting
  7. 16. A helper that speeds up a reaction without being used up
  8. 18. Mixing that helps particles collide more
  9. 19. Tiny pieces that must collide to react
  10. 20. A starting substance in a reaction
  11. 21. Adding this usually speeds up reactions
  12. 22. Needed for particles to react
  13. 24. What happens when conditions decrease reaction rate
Down
  1. 1. How often particles collide
  2. 2. In gases, more of this means more collisions
  3. 3. A substance formed after a reaction
  4. 4. Another word for reaction rate
  5. 5. When particles bump into each other
  6. 6. A combination of substances not chemically joined
  7. 8. More particles in the same space
  8. 10. Higher levels of this make particles move faster
  9. 15. How fast a chemical reaction happens
  10. 17. What happens when conditions increase reaction rate
  11. 23. A state of matter where pressure changes matter most