Sean's PT Crossword Puzzle

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Across
  1. 2. One of the 5 families, has Helium
  2. 3. The first element on the table
  3. 6. One of the 5 families, has Chlorine
  4. 8. Metals are to the left of this
  5. 10. A scientist who helped finalize the Periodic table
  6. 11. One of the 5 Families, has Sodium
  7. 14. Have a positive charge
  8. 15. Have a negative charge
  9. 17. Have no charge
  10. 18. When the number of Neutrons is different than usual
  11. 20. Are organized up and down
Down
  1. 1. One of the 5 families, has Magnesium
  2. 4. 2 Chemical combined elements in a fixed proportion
  3. 5. The number of elements on the periodic table
  4. 7. The Element the makes all life possible
  5. 9. It is in the title
  6. 12. They are graphed on the periodic table
  7. 13. One of the 5 families, has Boron
  8. 16. The last element on the table
  9. 19. Are organized across