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  1. Copper - Wikipedia

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

  3. Copper FactsCu or Atomic Number 29 - Science Notes and …

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

  5. Copper Facts: Chemical and Physical Properties - ThoughtCo

  6. 10 Copper Facts - Atomic Number 29 Symbol Cu - ThoughtCo

  7. Copper (Cu) - Definition, Preparation, Properties, Uses, …

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

  9. Copper (Cu) - ChemicalAid

  10. Copper Element | History, Uses, Facts, Physical Chemical