key words

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Across
  1. 3. connected atoms
  2. 4. in the gas phase
  3. 7. makes up every thing
  4. 8. how much space it taken up
  5. 10. elements that can be identified
  6. 12. makes up the PTOE
  7. 13. to fill a space
  8. 14. study of matter
  9. 15. Reaction reaction that makes a new substance
  10. 16. the act of filling space
  11. 18. water state of matter
  12. 19. steam state of matter
Down
  1. 1. an organized list of elements
  2. 2. it is close
  3. 5. represents the different elements
  4. 6. a push or pull
  5. 9. smallest an element can be
  6. 10. ice state of matter
  7. 11. the act of being close
  8. 15. Formula A code that represents the number
  9. 17. kinds of atoms in one particle of a substance