Elements of the Periodic Table

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