Classification of Matter

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Across
  1. 6. solid without any regular, internal geometric shape
  2. 8. abbreviations for compounds (two words put together)
  3. 10. homogeneous part separated by physical boundaries
  4. 11. not uniform in appearance, has parts with different properties (two words put together)
  5. 12. matter with a definite, fixed composition
  6. 13. positively charged ion
  7. 14. positively or negatively charged atom or group of atoms
  8. 16. properties intermediate between metals and those of nonmetals
  9. 17. not lustrous, low melting points and densities
  10. 18. numbers that appear below and to the right of symbol of an element
  11. 19. substance that contains two or more elements
  12. 20. indefinite volume and no fixed shape
  13. 21. union of two or more atoms
  14. 22. definite shape and volume
  15. 23. abbreviation of each element
Down
  1. 1. two or more physically distinct phases
  2. 2. anything with mass and occupies space
  3. 3. prepared by mixing correct amounts of salt and water (two words put together)
  4. 4. material containing two or more substances
  5. 5. solids at room temperature
  6. 6. smallest particle of an element that can exist
  7. 7. contain exactly two atoms (two words put together)
  8. 9. negatively charged ion
  9. 11. has same properties throughout
  10. 15. substance that cannot be broken down by chemical means to simpler substances
  11. 18. body of matter under consideration
  12. 24. definite volume but not shape