Help Uncover the Words

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Across
  1. 4. Atomic number 8
  2. 5. Atomic number 6
  3. 6. Atomic number 7
  4. 8. Atomic number 9
  5. 9. Atomic number 2
Down
  1. 1. Atomic number 1
  2. 2. Atomic number 10
  3. 3. Atomic number 3
  4. 5. Atomic number 17
  5. 7. Atomic number 11