The Periodic Table of Elements

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1234567891011121314151617181920
Across
  1. 2. Horizontal row on periodic table
  2. 4. Number at top left corner of periodic square
  3. 7. Vertical columns on periodic table
  4. 9. Number of groups of metals on periodic table
  5. 10. Letters that aren't on periodic table
  6. 12. Elements left of staircase
  7. 13. Elements right of staircase
  8. 16. Number of groups of nonmetals on periodic table
  9. 17. Number of groups on the periodic table
  10. 18. Number of periods on the periodic table
  11. 20. Letter in the middle of periodic square
Down
  1. 1. number at bottom of atomic square
  2. 3. Number of elements on periodic table
  3. 5. Last element in periodic table
  4. 6. Branch of science periodic table is in
  5. 8. First element in periodic table
  6. 11. What the periodic table is made of
  7. 14. Elements in staircase
  8. 15. First artificially made element
  9. 19. equal to atomic number