chemistry vocabulary

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Across
  1. 2. smallest part of an element
  2. 4. close to nucleus holds 2 electrons
  3. 6. determine the reactivity of an element
  4. 9. electricity and heat do not pass through it
  5. 10. holds 8 electrons
  6. 13. the elements on the right
  7. 15. not shiny
  8. 17. electricity and heat passes through
  9. 18. properties of both metals and non metals
  10. 19. the elements on the left of the table are
Down
  1. 1. run up and down in columns
  2. 3. located in nucleus,have positive charge
  3. 5. located in nucleus,have neutral charge
  4. 7. rows that go from left to right
  5. 8. holds 18 electrons
  6. 11. reflects light
  7. 12. located in electron cloud,have negative charge
  8. 14. shatters easily
  9. 16. can be pulled into a wire
  10. 20. atomic mass unit