Chemistry Elements Puzzle

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Across
  1. 3. 1s^2 2s^2 2p^1
  2. 7. 1s^2 2s^2 2p^6 3s^2 3p^3
  3. 8. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6 5d^10 6s^2 6p^2
  4. 10. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^5
  5. 11. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 5s^2
  6. 12. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^2
  7. 17. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^1
  8. 18. 1s^2 2s^2 2p^6 3s^2 3p^5
  9. 19. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 5s^1
  10. 22. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6
  11. 24. 1s^2 2s^2 2p^6 3s^2 3p^6 3^d10 4s^2 4p^6 4d^10 5s^2 5p^5
  12. 25. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
  13. 27. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^8 4s^2
  14. 28. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^1
  15. 30. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2
Down
  1. 1. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^1
  2. 2. 1s^2 2s^2
  3. 4. 1s^2 2s^2 2p^4
  4. 5. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6 5d^10 6s^1
  5. 6. Atomic number is 1.
  6. 9. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2
  7. 13. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^4
  8. 14. 1s^2 2s^2 2p^5
  9. 15. 1s^2 2s^2 2p^6 3s^2 3p^1
  10. 16. 1s^2 2s^1
  11. 20. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2
  12. 21. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^3
  13. 23. 1s^2
  14. 25. 1s^2 2s^2 2p^2
  15. 26. 1s^2 2s^2 2p^6 3s^2 3p^4
  16. 29. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^2