science

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Across
  1. 4. A small particle with a negative charge that is found in all atoms.
  2. 8. the smallest part of an element
  3. 11. gold
  4. 15. anything that takes up space
  5. 16. the amount of space that an object tacks up
  6. 19. holds all the elements
  7. 20. mixture that can't be separated easily
  8. 22. structure in a cell that contains the chromosomes
Down
  1. 1. an instrument used to measure volume
  2. 2. an instrument used to measure mass
  3. 3. mass divided by volume
  4. 5. water
  5. 6. helium, and oxygen are what.
  6. 7. O2
  7. 9. can be separated easily
  8. 10. element number c
  9. 12. two or more elements put together
  10. 13. the particles vibrate in place
  11. 14. a subatomic particle with a positive electrical charge
  12. 17. how is an element weighed
  13. 18. one of the three subatomic particles that make up an atom
  14. 21. the particles move slowly