Sean's PT Crossword

1234567891011121314151617181920
Across
  1. 1. The Element the makes all life possible
  2. 5. It is in the title
  3. 8. One of the 5 families, has Magnesium
  4. 9. When the number of Neutrons is different than usual
  5. 10. A scientist who helped finalize the Periodic table
  6. 11. 2 Chemical combined elements in a fixed proportion
  7. 12. Have a positive charge
  8. 18. One of the 5 Families, has Sodium
  9. 19. Are organized up and down
  10. 20. The last element on the table
Down
  1. 2. Have no charge
  2. 3. Metals are to the left of this
  3. 4. One of the 5 families, has Boron
  4. 6. Have a negative charge
  5. 7. They are graphed on the periodic table
  6. 13. One of the 5 families, has Helium
  7. 14. The first element on the table
  8. 15. The number of elements on the periodic table
  9. 16. One of the 5 families, has Chlorine
  10. 17. Are organized across