Periodic Table

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Across
  1. 5. element with the smallest atomic radius
  2. 7. negatively charged particle
  3. 10. the state of matter that we breathe
  4. 11. element 23
  5. 13. positively charged particle
  6. 15. soft metal we blew up in class
  7. 17. has no charge
  8. 18. the state of matter water is in
  9. 19. family with traits of both metals and nonmetals
  10. 21. tells how many energy levels there are
Down
  1. 1. model with rings
  2. 2. the family with 7 valence electrons
  3. 3. element at period 5 column 7A
  4. 4. metal that is liquid at room temperature
  5. 6. element with the largest atomic radius
  6. 8. state of matter that means dissolved in water
  7. 9. outermost shell
  8. 12. an atom with more neutrons than usual
  9. 14. the state of matter that ice is in
  10. 16. non-metal that is liquid at room temperature
  11. 20. model with valence electrons only