Periodic Table

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Across
  1. 2. The topic of this crossword
  2. 5. rule that states elements are energetically stable with a full valence shell
  3. 6. The group with 8 valance electrons
  4. 7. Lightest Nobel Gas
  5. 11. Reactive nonmetal on the left side
  6. 12. Neutral
  7. 13. Bottom of every box
  8. 16. Negative
  9. 17. Vertical categories on the table
  10. 18. Middle of the Periodic Table
  11. 19. horizontal categories on the table
Down
  1. 1. Found in the outmost energy level
  2. 2. Positive
  3. 3. Contains group one and two
  4. 4. Contains Lanthanides and Actinides
  5. 8. Meitnerium to Oganesson
  6. 9. What the table is made of
  7. 10. Heaviest Alkali Metal
  8. 14. Upper left of every box
  9. 15. In between Post Transition Metals and Reactive Nonmetals