Very Hard Periodic Table of Elements Crossword Puzzle Part 5

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Across
  1. 5. The element known as S on the periodic table of elements
  2. 7. The element known as Pr on the periodic table of elements
  3. 9. The element known as Rf on the periodic table of elements
  4. 11. The element known as Sg on the periodic table of elements
  5. 15. The element known as Ru on the periodic table of elements
  6. 16. The element known as Pt on the periodic table of elements
  7. 17. The element known as Po on the periodic table of elements
  8. 18. The element known as Re on the periodic table of elements
  9. 19. The element known as Sm on the periodic table of elements
  10. 20. The element known as Sb on the periodic table of elements
Down
  1. 1. The element known as Se on the periodic table of elements
  2. 2. The element known as Sc on the periodic table of elements
  3. 3. The element known as Rn on the periodic table of elements
  4. 4. The element known as Sn on the periodic table of elements
  5. 6. The element known as Rg on the periodic table of elements
  6. 8. The element known as Rb on the periodic table of elements
  7. 10. The element known as Rh on the periodic table of elements
  8. 12. The element known as Pu on the periodic table of elements
  9. 13. The element known as Ra on the periodic table of elements
  10. 14. The element known as Si on the periodic table of elements