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Across
  1. 2. The chemical we exhale, _____ Dioxide.
  2. 4. The name of symbol Xe.
  3. 8. The name of Symbol Ag.
  4. 12. The element present on pencils.
  5. 13. The element with high thermal and electric conductivity and has the symbol Cu.
  6. 14. The name of symbol Ra.
  7. 15. The element Na present in salt with Chloride.
  8. 17. The name of symbol Zn.
  9. 18. The element we breathe.
  10. 19. The name of Symbol Hg.
  11. 20. The first most abundant element in air, with symbol N.
Down
  1. 1. The name of symbol Fe.
  2. 3. The element present in coins.
  3. 5. The name of Symbol K.
  4. 6. The element good for your bones.
  5. 7. The name of Symbol Si.
  6. 9. The element used on balloons to fly.
  7. 10. The name of symbol Zr.
  8. 11. The fifth element in the periodic table.
  9. 16. The first chemical element in the periodic table.