Metals

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Across
  1. 3. Toxic heavy metal
  2. 6. Metal that burns easily
  3. 8. When you win first place, you get a ... medal
  4. 9. A song by Sia
  5. 11. Used in nuclear power
  6. 12. Radioactive element named after a god
Down
  1. 1. Alloy of iron and carbon
  2. 2. Alloy made of copper and zinc
  3. 4. Sometimes used for dental fillings
  4. 5. Lightweight metal
  5. 7. Fictional metal in the Marvel Universe
  6. 10. Ag on the periodic table