Periodic Table

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Across
  1. 2. Upper left of every box
  2. 3. Lightest Nobel Gas
  3. 6. What the table is made of
  4. 8. Contains group one and two
  5. 9. Rule about what makes an element energetically stable
  6. 10. Vertical categories on the table
  7. 11. Positive
  8. 13. Neutral
  9. 14. In between Post Transition Metals and Reactive Nonmetals
  10. 15. Heaviest Alkali Metal
  11. 17. 109-118
  12. 18. Negative
  13. 19. Contains Lanthanides and Actinides
Down
  1. 1. Found in the outmost energy level
  2. 3. Reactive nonmetal on the left side
  3. 4. The group with 8 valance electrons
  4. 5. Bottom of every box
  5. 7. The topic of this crossword
  6. 12. Middle of the Periodic Table
  7. 16. horizontal categories on the table