Periodic Table Puzzle

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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960
Across
  1. 3. Group 14 and Period 2
  2. 6. Group 3 and Period 4
  3. 7. Group 7 and Period 5
  4. 9. Group 1 and Period 5
  5. 11. Group 13 and Period 2
  6. 14. Group 11 and Period 6
  7. 15. Group 17 and Period 5
  8. 17. Group 2 and Period 3
  9. 18. Group 14 and Period 5
  10. 20. Group 3 and Period 5
  11. 21. Group 2 and Period 4
  12. 24. Group 15 and Period 3
  13. 26. Group 14 and Period 6
  14. 27. Group 9 and Period 4
  15. 30. Group 8 and Period 5
  16. 32. Group 18 and Period 3
  17. 33. Group 12 and Period 5
  18. 34. Group 16 and Period 4
  19. 36. Group 7 and Period 4
  20. 39. Group 2 and Period 7
  21. 40. Group 14 and Period 4
  22. 47. Group 4 and Period 5
  23. 48. Group 13 and Period 5
  24. 49. Group 12 and Period 4
  25. 50. Group 6 and Period 4
  26. 52. Group 9 and Period 5
  27. 54. Group 10 and Period 5
  28. 56. Group 18 and Period 2
  29. 57. Group 10 and Period 4
  30. 59. Group 16 and Period 2
  31. 60. Group 8 and Period 4
Down
  1. 1. Group 1 and Period 7
  2. 2. Group 2 and Period 2
  3. 4. Group 15 and Period 5
  4. 5. Group 16 and Period 3
  5. 8. Group 15 and Period 2
  6. 10. Group 13 and Period 4
  7. 12. Group 1 and Period 4
  8. 13. Group 15 and Period 6
  9. 16. Group 18 and Period 5
  10. 18. Group 16 and Period 5
  11. 19. Group 2 and Period 5
  12. 22. Group 6 and Period 5
  13. 23. Group 17 and Period 2
  14. 25. Group 18 and Period 4
  15. 27. Group 1 and Period 6
  16. 28. Group 1 and Period 3
  17. 29. Group 4 and Period 4
  18. 31. Group 11 and Period 4
  19. 35. Group 1 and Period 1
  20. 37. Group 5 and Period 5
  21. 38. Group 1 and Period 2
  22. 41. Group 17 and Period 4
  23. 42. Group 18 and Period 1
  24. 43. Group 11 and Period 5
  25. 44. Group 5 and Period 4
  26. 45. Group 14 and Period 3
  27. 46. Group 2 and Period 6
  28. 51. Group 15 and Period 4
  29. 53. Group 18 and Period 6
  30. 55. Group 13 and Period 3
  31. 58. Group 17 and Period 3