Chemistry Unit 5 Vocabulary

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Across
  1. 2. reaction with oxygen that releases energy
  2. 4. substances formed in a chemical reaction
  3. 9. substance that speeds up a reaction without being used up
  4. 11. starting substances in a chemical reaction
  5. 12. positively charged ion
  6. 15. numbers placed in front of formulas in an equation
  7. 17. amount of exposed area of a substance
  8. 18. adjusting an equation so atoms are equal on both sides
  9. 20. representation of a chemical reaction using symbols
Down
  1. 1. reaction where one compound breaks into simpler substances
  2. 3. reaction where substances combine into one product
  3. 5. how easily a substance undergoes a chemical reaction
  4. 6. small numbers showing atoms in a formula
  5. 7. negatively charged ion
  6. 8. amount of substance in a given volume
  7. 10. notation showing the types and numbers of atoms
  8. 13. energy of motion of particles
  9. 14. measure of average kinetic energy of particles
  10. 16. process of making an equation follow conservation of mass
  11. 19. amount of matter in an object