IPC Test Extra Credit (20 points)

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Across
  1. 3. mass divided by volume
  2. 4. beginning substances in a chemical reaction
  3. 6. when the appearance of a substance changes
  4. 7. the atomic number of an element
  5. 10. another sign of a chemical reaction
  6. 11. mass divided by volume
  7. 12. when the atoms rearrange to form a new substance
  8. 13. the center of the atom
  9. 14. symbols and formulas to describe a reaction
  10. 15. discovered the nucleus has a positive charge
Down
  1. 1. proposed the Plum Pudding model
  2. 2. substances created in a chemical reaction
  3. 5. proposed that the atom is indivisible
  4. 8. has 10 electrons
  5. 9. when the atoms rearrange to form a new substance