Periodic Table Crossword

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Across
  1. 3. Used for light bulbs.
  2. 5. Burns with a white flame.
  3. 8. 78% of the Earth's atmosphere.
  4. 9. Lighter than air, non-flammable.
  5. 10. Main basis of life, found in diamonds and graphite.
  6. 11. Smells like eggs.
  7. 13. Metal in table salts.
  8. 16. Light metal, in rechargeable batteries.
  9. 17. Breathed by human beings and animals.
  10. 18. Found in our computer chips.
  11. 19. Consume this to strengthen bones.
Down
  1. 1. Found in borax and glass making.
  2. 2. Gives emeralds a green color.
  3. 4. Found in matches.
  4. 6. Noble gas, glows.
  5. 7. Essential for nerve function.
  6. 9. The lightest element in the universe.
  7. 12. Used in toothpaste.
  8. 14. Commonly bought in foil form.
  9. 15. Used in swimming pools.