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Copper - Wikipedia
Copper | Uses, Properties, & Facts | Britannica
Copper - Element information, properties and uses | Periodic Table
Copper Facts - Science Notes and Projects
Facts About Copper - Live Science
Copper Facts: Chemical and Physical Properties - ThoughtCo
Copper - Wikiwand
Copper: introduction to the chemical element - Explain that Stuff
Copper - Compounds, Properties, Uses | Britannica
Properties & Uses - Copper