Periodic Table

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Across
  1. 3. Makes up our bones.
  2. 5. The most radioactive element.
  3. 6. Heaviest natural element.
  4. 9. The most abundant gas in our atmosphere.
  5. 10. Used in the bombs Gadget and Fat Man.
  6. 11. Liquid-like metal.
Down
  1. 1. Reacts very violently to water.
  2. 2. A deadly gas.
  3. 4. Only has one electron.
  4. 7. Makes up around 21% of our atmosphere.
  5. 8. Used in most modern wiring.