Elements of the Periodic Table Crossword

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Across
  1. 4. An important element in bones.
  2. 5. Poison gas in WWI
  3. 6. The lightest inert gas.
  4. 9. As liquid metal that was used in thermometers.
  5. 11. The most common inert gas in the atmosphere.
  6. 12. The element we need to breathe.
  7. 14. Heavy metal used in paints, batteries, and radiation shields.
  8. 15. A metal sought after during the Klondike.
  9. 16. A metal used in foil.
  10. 18. A metal used in wires.
  11. 19. This metal is used along with carbon to make steel.
Down
  1. 1. Most common element in the earth's atmosphere.
  2. 2. 2nd place in the Olympics.
  3. 3. A component of gunpowder that smells like rotten eggs.
  4. 5. The element diamonds are made from.
  5. 7. A radioactive element often used in nuclear power stations.
  6. 8. The most common element in the universe.
  7. 10. Alkaline metal in table salt.
  8. 13. Element used to make semi-conductors (computer chips).
  9. 16. A famous poison that turns your tongue black.
  10. 17. An inert gas used to make bright city lights.