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  1. Copper - Wikipedia

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

  3. All About Copper - Xometry

  4. Copper - Specifications, Properties, Classifications and Classes - AZoM.com

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

  6. Copper Facts: Chemical and Physical Properties - ThoughtCo

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

  8. What Is Copper? | Full Guide to Copper, Facts & More

  9. Copper Mineral | Uses and Properties - Geology.com

  10. Properties & Uses - Copper