Chemistry Crossword Puzzle

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Across
  1. 3. Prefix for 1000
  2. 5. Hydrogen and a nonmetal element
  3. 7. Composed of two different nonmetals
  4. 8. A negatively charged ion
  5. 11. Composed of only one type of atom or molecule
  6. 12. Tentative explanation for observations
  7. 14. Science that seeks to understand how matter behaves by studying the behavior of atoms and molecules
  8. 18. Atoms or molecules arranged in geometric patterns
  9. 19. The basic particles of elements
  10. 20. Phase change from gas to solid
Down
  1. 1. More than one atom
  2. 2. value of y when x=0
  3. 4. State of matter with indefinite shape and definite volume
  4. 6. ____= mass/volume
  5. 9. Explains what will happen
  6. 10. Explains why something happens
  7. 13. A positively charged ion
  8. 15. Prefix for 7 in binary molecular compounds
  9. 16. Phase change from liquid to solid
  10. 17. Cannot be created or destroyed