Very Hard Periodic Table of Elements Crossword Puzzle

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Across
  1. 4. The element known as Cd on the periodic table of elements
  2. 6. The element known as Ag on the periodic table of elements
  3. 7. The element known as Bi on the periodic table of elements
  4. 9. The element known as Ca on the periodic table of elements
  5. 10. The element known as Cf on the periodic table of elements
  6. 12. The element known as Ba on the periodic table of elements
  7. 13. The element known as Be on the periodic table of elements
  8. 16. The element known as Ar on the periodic table of elements
  9. 17. The element known as Bk on the periodic table of elements
  10. 18. The element known as Al on the periodic table of elements
Down
  1. 1. The element known as Am on the periodic table of elements
  2. 2. The element known as Ce on the periodic table of elements
  3. 3. The element known as B on the periodic table of elements
  4. 5. The element known as At on the periodic table of elements
  5. 8. The element known as Ac on the periodic table of elements
  6. 10. The element known as C on the periodic table of elements
  7. 11. The element known as As on the periodic table of elements
  8. 14. The element known as Br on the periodic table of elements
  9. 15. The element known as Au on the periodic table of elements
  10. 17. The element known as Bh on the periodic table of elements