Periodic Table of Elements

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1234567891011121314
Across
  1. 2. Element with symbol O
  2. 4. Last element
  3. 7. Element with symbol Pb
  4. 11. Element with atomic number 70
  5. 13. Group of Boron and Silicon
  6. 14. Heaviest element
Down
  1. 1. gases group of hydrogen
  2. 3. Vertical lines
  3. 5. One or two-letter abbreviation
  4. 6. Element with atomic number 20
  5. 8. 1st element
  6. 9. Horizontal lines
  7. 10. Element with symbol Au
  8. 12. Element with Symbol Ag