Periodic Puzzle

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Across
  1. 2. This element is found on the 4th period, has a common charge of +4, and has 4 valence electrons.
  2. 3. This element is found on the 4th period, has a common charge -3, and has 5 valence electrons.
  3. 5. This element is found on the 5th period, has a common charge of +10, and has 2 valence electrons.
  4. 6. This element is found on the 4th period, has a common charge of -1, and has 7 valence electrons.
  5. 8. This element is found on the 3rd period, has a common charge of +4/-4, and has 4 valence electrons.
  6. 9. This element is found on the 4th period, has a common charge of +9, and has 2 valence electrons.
  7. 10. This element is found on the 6th period, has a common charge of +11, and has 11 valence electrons.
  8. 11. This element is found on the 5th period, has a common charge of +7, and has 2 valence electrons.
  9. 15. This element is found on the 2nd period, has a common charge of +3, and has 3 valence electrons
  10. 16. This element is found on the 4th period, has a common charge of +7, and has 2 valence electrons.
  11. 18. This element is found on the 3rd period, has a common charge of +1, and has +1 valence electron.
  12. 19. This element is found on the 1st period, has a common charge of +1, and has 1 valence electron.
  13. 20. This element is found on the 6th period, has a common charge of +1, and has 1 valence electron.
  14. 22. This element is found on the 6th period, has a common charge of +4/-4, and has 10 valence electrons.
  15. 23. This element is found on the 5th period, has a common charge of +5, and has 2 valence electrons.
  16. 25. This element is found on the 4th period, has a common charge of +12, and has 2 valence electrons.
Down
  1. 1. This element is found on the 5th period, has a common charge of +1, and has 1 valence electron.
  2. 4. This element is found on the 5th period, has a common charge of +3, and has 2 valence electrons.
  3. 5. This element is found on the 3rd period, has a common charge of -3, and has 5 valence electrons.
  4. 7. This element is found on the 5th period, has a common charge of +6, and has 2 valence electrons.
  5. 9. This element is found on the 3rd period, has a common charge of -1, and has 4 valence electrons.
  6. 11. This element is found on the 5th period, has a common charge of +4/-4, and has 4 valence electrons.
  7. 12. This element is found on the 4th period, has a common charge of +2, and has 2 valence electrons.
  8. 13. This element is found on the 2nd period, has a common charge of 0, and has 0 valence electrons.
  9. 14. This element is found on the 4th period, has a common charge of +5, and has 2 valence electrons.
  10. 15. This element is found on the 2nd period, has a common charge of +2, and has 2 valence electrons
  11. 17. The element is found on the 2nd period, has a common charge of -3, and has 7 valence electrons.
  12. 20. This element is found on the 2nd period, has a common charge of +4/-4, and has 4 valence electrons.
  13. 21. This element is found on the 3rd period, has a common charge of -2, and has 6 valence electrons.
  14. 24. This element is found on the 4th period, has a common charge of +8, and has 2 valence electrons.