First 20 Elements

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Across
  1. 3. Helps you breath.
  2. 5. The first element in the periodic table.
  3. 8. Its symbol is "Li"
  4. 11. A foil used to cover food.
  5. 13. Used to make Balloons Float!
  6. 14. Makes up coal!
  7. 16. Is used to create Fireworks!
  8. 18. Found in Milk.
  9. 20. It has 7 Protons!
  10. 22. Can be written as Co2.
Down
  1. 1. Put in swimming pools as a disinfectant.
  2. 2. Rhymes with Chlorine!
  3. 4. Can be found in your bones with Clacium.
  4. 6. With the help or chlorine it creates salt!
  5. 7. It has an atomic nummber of 4!
  6. 9. It's symbol is Mg.
  7. 10. High amounts found in bananas!
  8. 12. Makes things glow!
  9. 15. Symbol is the 2nd letter of the alphabet!
  10. 17. Also known as H2O!
  11. 19. It is the 18th element!
  12. 21. The Symbol is the first letters of Silly!