Periodic Table

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123456789101112131415161718
Across
  1. 2. Period5Group17
  2. 5. Group14Period5
  3. 7. Period4Group8
  4. 9. Group1Period1
  5. 12. Group15Period4
  6. 15. Group2Period6
  7. 17. Group13Period3
  8. 18. Period1Group18
Down
  1. 1. Group14Period6
  2. 3. Period2Group15
  3. 4. Group11Period6
  4. 6. Period18Group2
  5. 8. Group1Period4
  6. 10. Period7Group2
  7. 11. Period4Group16
  8. 13. Period3Group1
  9. 14. Group2Period4
  10. 16. Period5Group11