Chemistry Elements (extra credit)

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Across
  1. 3. period 6 group 14
  2. 6. positively charged particles(same as atomic number)
  3. 9. atomic number= 85
  4. 10. ion with negative charge
  5. 12. group 18
  6. 13. atomic weight= 22.990
  7. 14. atomic weight= 195.085
  8. 17. negative charged particles
  9. 18. has 16 protons
  10. 20. least reactive element
Down
  1. 1. group 1
  2. 2. element initials are DS
  3. 4. atomic number= 20
  4. 5. ion with positive charge
  5. 7. groups 3-12
  6. 8. period 4 group 13
  7. 11. noble gas in period 2
  8. 15. horizontal rows
  9. 16. no- charge/neutral particles
  10. 19. vertical columns