Chemistry Final Exam

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Across
  1. 3. atom's ability to attract electrons
  2. 4. liquid becomes a solid
  3. 5. an educated guess
  4. 9. compound breaks down into 2 or more simpler substance
  5. 10. element/compound you start with
  6. 13. electrons in the outermost energy level
  7. 15. Can be physically separated
  8. 18. changes the identity of a substance
  9. 19. gains electrons and becomes negatively charged
  10. 20. Cannot be physically separated
  11. 21. Hight KE- particles can separate & move throughout ex: helium
  12. 22. Positive charge
  13. 23. neutral charge
Down
  1. 1. Anything that has mass and can take up space
  2. 2. elements on the left side are called
  3. 6. can be seen without changing the identity of the substance
  4. 7. Low KE-particles can move around but are still close together ex: water
  5. 8. loses electrons and becomes positively charged
  6. 9. amount of matter per unit volume
  7. 11. Negative charge
  8. 12. type of bond between two nonmetals
  9. 14. elements on the right side are called
  10. 16. Very low KE- particles vibrate but can't move around ex: ice
  11. 17. Gas becomes a liquid