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10								11							12					13			14
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28																						29		30			31
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			50													51										52
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Across 5. .14% in human body 7. Cl 8. Sn 9. Pb 10. Sr 13. C 17. 10% in human body 20. Ni 21. Pt 23. The ____ _______ Model. 24. Ga 27. 3% in human body 28. .50% in human body 30. Fe 32. Cd 34. 65% in human body 36. F 37. Ce 40. 18% in human body 42. 1% in human body 44. Co 45. Ca 47. K 48. .26% in human body 50. Rn 51. Si 53. B 54. Se 55. Pb

Down 1. How many steps are in Dalton's Atomic Theory? 2. Be 3. Al 4. Ag 6. pale blue gas 7. pale green gas 10. Si 11. Mg 12. colorless gas 14. Ba 15. Cu 16. pale yellow gas 17. H 18. colorless gas 19. Na 22. ____________ Experiment. 25. lustrous, dark pruple solid 26. reddish-brown liquid 29. O 31. Ne 33. .34% in human body 35. P 38. Xe 39. _________ Experiment. 41. He 43. Nb 44. C 45. 1.4% in human body 46. Ar 49. Zn 52. Au