Periodic table

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Across
  1. 3. O, 8
  2. 4. Ra, 88
  3. 6. Li, 3
  4. 9. He, 2
  5. 10. N, 7
  6. 11. C, 6
Down
  1. 1. K, 19
  2. 2. Ge, 32
  3. 5. Fm, 100
  4. 7. Fe, 36
  5. 8. W, 74