Unit 3 Chemical Reactions

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Across
  1. 2. substances present after chemical reaction
  2. 4. basic unit of matter
  3. 5. change that results in new substance
  4. 9. characteristics
  5. 10. tells number of atoms of an element
  6. 14. only factor that can be changed in chem equation
  7. 15. pure substance with only one type of atom
  8. 16. amount of space object occupies
  9. 17. when a chemical change occurs, properties __
  10. 19. pure substance with more than one type of atom
Down
  1. 1. change that does not result in new substance
  2. 3. substances present before chemical reaction
  3. 6. releases heat; temp increases
  4. 7. amount of matter in an object
  5. 8. evidence of gas production
  6. 11. takes up space and has mass
  7. 12. Law of __ of mass; total amount of matter is constant
  8. 13. absorbs heat; temp decreases
  9. 15. a chemical ___ represents a chemical reaction
  10. 18. represents yields/produces