Periodic Crossword of Elements

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Across
  1. 4. I am a gas that keeps you alive
  2. 5. 9,4
  3. 7. 12,4
  4. 8. I make your voice squeaky and have 2 neutrons
  5. 12. U
  6. 13. Pt
  7. 14. 15,3
  8. 17. 10,6
  9. 18. My atomic number is 11 and I am found in salt
  10. 20. I have 26 neutrons
  11. 21. I have 19 protons and am found in bananas
  12. 23. I have 80 protons
  13. 24. 11,5
Down
  1. 1. I am a common metal and am used to make steel
  2. 2. I have 42 protons
  3. 3. Pb
  4. 6. I have the highest melting point out of all the metals
  5. 9. 16,4
  6. 10. I am the lightest element in the Alkali metal family
  7. 11. I have 16 neutrons and smell like rotten eggs
  8. 15. 4,6
  9. 16. I am an element used to make diamonds
  10. 19. Ir
  11. 22. 7,5