Crossword

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Across
  1. 2. ability of an atom to undergo a chemical reaction
  2. 4. energy is absorbed/added
  3. 5. used to meausre air pressure
  4. 10. energy due to position
  5. 11. atom with a positive or negative charge
  6. 16. measure of disorder in a system
  7. 17. distance between 2 crests
  8. 19. movement of gas through a small opening
  9. 20. # of waves passing through a single point in 1 sec
Down
  1. 1. atom with a positive charge
  2. 3. device measuring the amount of heat released/absorbed
  3. 6. energy traveling in waves through space
  4. 7. required to remove a valence electron from an atom
  5. 8. horizontal rows of the periodic table
  6. 9. vertical columns of periodic table
  7. 12. energy due to an object's motion
  8. 13. limitations of a design
  9. 14. heat transfer by movement within fluids
  10. 15. matter & energy can flow in & out
  11. 18. amount of physical space occupied