ELEMENTS

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Across
  1. 2. Atomic mass:137.33
  2. 3. Xe 4f14 5d2 6s2
  3. 7. Also a planet
  4. 9. [Ar] 4s2 3d10 4p3
  5. 10. Pd
  6. 13. The most American element
  7. 16. Most of earth's air
  8. 17. Pm
  9. 19. What is the leading component in gunpowder?
  10. 20. W
Down
  1. 1. What most bones need to grow
  2. 4. Atomic mass:210
  3. 5. What a penny was made of
  4. 6. Atomic mass:231.0359
  5. 8. Ar 3d3 4s2
  6. 11. Kr 4d5 5s1
  7. 12. what was used in harmful paints and toys
  8. 14. What is found in most pools
  9. 15. Xe 4f14 5d7 6s2
  10. 18. less than 1% of our atmosphere