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