Classification of Matter Crossword

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Across
  1. 3. letter or series of letters that represent an element on the periodic table
  2. 5. part of a system separated from other parts by physical boundaries
  3. 7. two or more atoms that are chemically combined
  4. 8. molecule containing 2 or more chemically combined elements
  5. 9. phase of matter that is an ionized gas; high temperature
  6. 10. type of solid with no internal geometric pattern (such as gel)
  7. 13. column of nonreactive elements on periodic table
  8. 15. number that indicates how many atoms of that element are in a molecule
  9. 16. H2O is the _____ of water (2 words)
  10. 18. an atom or group of atoms with a positive or negative charge
  11. 19. particular type of matter with definite fixed composition
  12. 20. ion with a negative charge
  13. 21. category of elements that have properties similar to metals and nonmetals
  14. 23. homogeneous mixture (such as salt water)
  15. 24. anything that has mass and occupies space
  16. 25. substance that cannot be broken down by chemical means
  17. 27. ion with a positive charge
Down
  1. 1. phase of matter with definite volume, no definite shape
  2. 2. category of elements that aren't conductive and brittle
  3. 3. body of matter under consideration
  4. 4. the only diatomic element that is a liquid at room temperature
  5. 6. matter that is consistent throughout (such as water)
  6. 11. phase of matter with with indefinite volume and shape
  7. 12. matter that is not consistent throughout (such as apple pie)
  8. 14. phase of matter with definite shape and volume
  9. 16. diamonds, graphite and petroleum are some forms of this element
  10. 17. smallest possible particle of an element
  11. 21. matter containing 2 or more substances
  12. 22. elements that pair together in nature (seven in total)
  13. 26. category of elements that are highly conductive and malleable