Periodic puzzler

12345678910111213141516171819
Across
  1. 2. first chart arranged in numerical order by --
  2. 3. going across a row, atomic radius tends to --
  3. 6. this family of nonmetals like to be -2
  4. 9. going across a row, # of valence e- --
  5. 11. this group of nonmetals are the salt formers
  6. 13. only liquid nonmetal
  7. 14. on the chart, patterns restart at the -- of a row
  8. 17. this group of metals reacts violently with water
  9. 18. relates to the size of an atom
  10. 19. this family of metals is quite reactive
Down
  1. 1. atoms want the same # of -- as a noble gas
  2. 2. developed the first periodic chart
  3. 4. going down a column, preferred charged tends to --
  4. 5. current chart in numerical order by # of --
  5. 7. this group is the least reactive on the chart
  6. 8. this group on the "zigzag" are semiconductors
  7. 10. desire to gain electrons
  8. 12. repeats in a regular pattern
  9. 15. this group contains most of the common metals
  10. 16. this family are all heavy and radioactive