Crossword Puzzle

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Across
  1. 2. electrons are located in _______ levels
  2. 5. location of protons and neutrons
  3. 6. unit of mass
  4. 7. electrons involved in chemical reactions
  5. 9. unit of length
  6. 12. mass divided by volume
  7. 16. water bonding to water
  8. 17. atomic particle with no charge
  9. 18. another name for an energy level
  10. 19. two dimensional model of an atom and its electrons
Down
  1. 1. water bonding to different substances
  2. 3. wear to protect your eyes in lab
  3. 4. _________ tension allows insects to float on water
  4. 8. atomic particle with a negative charge
  5. 10. __________ dot structures
  6. 11. atomic particle with a positive charge
  7. 13. lab equipment that measures mass
  8. 14. where you read the level in a graduated cylinder
  9. 15. unit of volume