Elements of the Periodic Table

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Across
  1. 4. Long-term exposure can lead to tremors.
  2. 8. Pop cans are made out of this metal.
  3. 10. Used to treat swimming pools.
  4. 11. Uranium is used as fuel in ___ power plants.
  5. 13. Used to make matches and fireworks
  6. 17. Iron is used to make ___.
  7. 19. A soft, yellow metal.
  8. 20. This province has some of Canada's largest copper mines.
  9. 21. Used in X-ray shielding, such as at the dentist
Down
  1. 1. Oxygen is part of the fire ___.
  2. 2. Used to cool MRI machines
  3. 3. Was commonly used in rat poison.
  4. 5. Found in all living things
  5. 6. Makes up 78% of Earth's atmosphere
  6. 7. Fluorine helps prevent ___ decay.
  7. 9. A gas that caught fire in the Hindenburg disaster
  8. 12. Sulfur smells like rotten ___.
  9. 14. Its symbol is Ag.
  10. 15. Sodium is element number ___.
  11. 16. Used to make mustard gas during WWI.
  12. 18. Carbon forms these precious gems