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  1. Copper - Wikipedia

  2. Copper | Uses, Properties, & Facts | Britannica

  3. Copper Facts – Cu or Atomic Number 29 - Science Notes and …

  4. Copper Facts: Chemical and Physical Properties - ThoughtCo

  5. Copper (Cu) - Definition, Preparation, Properties, Uses ... - Examples

  6. Copper - Element information, properties and uses | Periodic Table

  7. All About Copper - Xometry

  8. What is Copper?- Its Uses, Compounds & Properties - Mechdaily

  9. Copper (Cu) - Uses, Density of Copper, Element Data, Physical ...

  10. Copper: introduction to the chemical element - Explain that Stuff

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