Families of the Periodic Table

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Across
  1. 2. family of elements located in Group 5
  2. 6. a row on the periodic table
  3. 7. family of elements located in Group 3
  4. 8. a column on the periodic table
  5. 10. all the elements in a row have the same number of _____________
  6. 11. family of elements located in Group 4
  7. 13. the number of valence electrons in Group 6
  8. 15. the number of valence electrons in Group 7
  9. 16. the number of valence electrons in Group 4
  10. 17. number of valence electrons in Group 8
  11. 19. family of elements located in the middle of periodic table
Down
  1. 1. family of elements located in Group 7
  2. 3. number of valence electrons for each element in Group 2
  3. 4. family of elements located in Group 8
  4. 5. the number of valence electrons for each element in Group 3
  5. 9. family of elements located in Group 2
  6. 12. the number of valence electrons for each element in Group 1
  7. 14. family of elements located in Group 1, not including hydrogen
  8. 18. the number of valence electrons in Group 5
  9. 20. the family of elements located in Group 6