Periodic Table Crossword

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Across
  1. 6. Gas needed to live
  2. 7. Least electronegative
  3. 9. Commonly found in wires
  4. 10. Component of steel
  5. 12. Found in turkey bullets
  6. 16. High heat tolerance
  7. 17. Build bone density
  8. 18. Found in bananas
  9. 19. Used in nuclear reactors
  10. 22. Lightest element
  11. 23. Component of sand
Down
  1. 1. Majority of the atmosphere
  2. 2. Foundation of organic chemistry
  3. 3. Cleaning agent
  4. 4. Most diamagnetic (repulsive)
  5. 5. Type of rechargeable battery
  6. 8. Used for superconductors
  7. 11. Smallest radius
  8. 13. Ion form used to fire neurons
  9. 14. Most electronegative
  10. 15. Found in "old" thermometers
  11. 20. Purple gas
  12. 21. Third most abundant in atmosphere