Periodic table

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Across
  1. 4. Group 2
  2. 6. Size of a neutral atom
  3. 11. Luster, good conductors, malleable
  4. 12. Multiple oxidation states, have color
  5. 19. Higher than #92 on the periodic table
Down
  1. 1. Group 18
  2. 2. Measure of attraction of a nucleus
  3. 3. Horizontal rows on table
  4. 4. Group 1
  5. 5. Vertical rows on table
  6. 7. Has properties of metals and nonmetals
  7. 8. Set of properties typical in metals
  8. 9. Problem with the first periodic table
  9. 10. Can be shaped/hammered
  10. 13. Size of an ion
  11. 14. Poor conductors, brittle
  12. 15. Energy needed to pull electron away
  13. 16. Group 17
  14. 17. Another name for a group
  15. 18. Invented first periodic table