Reading the Periodic Table

123456789101112131415161718
Across
  1. 4. Group 1: Period 4
  2. 6. Group 18: Period 2
  3. 8. Group 9: Period 4
  4. 10. Group 16: Period 2
  5. 13. Group 16: Period 4
  6. 14. Group 2: Period 4
  7. 15. Group 1: Period 1
  8. 16. Group 12: Period 4
  9. 18. Group 15: Period 3
Down
  1. 1. Group 14: Period 2
  2. 2. Group 17: Period 2
  3. 3. Group 17: Period 5
  4. 5. Group 11: Period 5
  5. 7. Group 17: Period 4
  6. 8. Group 11: Period 4
  7. 9. Group 18: Period 3
  8. 11. Group 1: Period 2
  9. 12. Group 1: Period 3
  10. 15. Group 18: Period 1
  11. 17. Group 14: Period 5