Elements of the periodic table

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Across
  1. 4. what dose Kr stand for
  2. 7. what dose S stand for
  3. 9. what dose Au stand for
  4. 12. what dose O stand for
  5. 14. what dose Ar stand for
  6. 15. what dose He stand for
  7. 17. what dose Rn stand for
  8. 18. What dose N stand for
  9. 20. what dose Ne stand for
Down
  1. 1. what does H2O stand for
  2. 2. what dose Cu stand for
  3. 3. What dose F stand for
  4. 5. what dose W stand for
  5. 6. what does H stand for
  6. 8. what dose B stand for
  7. 10. what dose Pb stand for
  8. 11. what does Mg stand for
  9. 13. What dose Si stand for
  10. 16. what dose Hg stand for
  11. 19. what dose Zn stand for