Chapter 3 (Use your vocabulary & periodic table)

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Across
  1. 4. matter with same composition throughout
  2. 8. dull in appearance/poor conductor of electricity
  3. 14. shiny and good conductor of electricity
  4. 15. atoms of same element w/ different # of neutrons
  5. 16. Li
  6. 19. particle with no charge
Down
  1. 1. Be
  2. 2. H
  3. 3. central part of an atom
  4. 5. atoms of more than one element bonded together
  5. 6. matter made of only one kind of atom
  6. 7. positively charged particle
  7. 9. number of protons + number of neutrons
  8. 10. He
  9. 11. B
  10. 12. top number of an element
  11. 13. negatively charged particle
  12. 17. anything that has mass and takes up space
  13. 18. small particles that makes up most kinds of matter