Chemistry unit study guide

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Across
  1. 2. conductors of electricity, chemical reactivity
  2. 3. quantity obtained by combining quantities together
  3. 6. states that matter can be changed from on into another
  4. 8. elements that lacks metallic properties
  5. 9. electron electron on edge of atom
  6. 11. a substance on the periodic table
  7. 13. negative charge
  8. 15. element symbol
  9. 19. number of protons
  10. 20. release of heat
  11. 22. smallest particle in a chemical element or compound
  12. 23. column of elements
  13. 24. thin layer of metal that has been added to outside of something
Down
  1. 1. positive charge
  2. 2. chemical element in common with typical metals
  3. 3. row of elements
  4. 4. that undergoes change during a reaction
  5. 5. Russian, creator of periodic table
  6. 7. smallest part of molecule
  7. 10. absorption of heat
  8. 12. thing that's composed of 2 or more separate elements
  9. 14. middle part of atom
  10. 16. any element in the group O(helium)
  11. 17. patterns of electron density
  12. 18. mass of atomic particle
  13. 21. nuetral charge