The periodic table

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Across
  1. 4. H 1776 1
  2. 6. F 1886 1710
  3. 7. Ne 1898 18
  4. 9. Be 1797 2
  5. 10. N 1772 15
Down
  1. 1. O 1774 16
  2. 2. B 1808 13
  3. 3. He 1895 18
  4. 5. Li 1817 1
  5. 8. C Ancient 14