| ChemGlobe: Copper: Electronic, thermal, and steric data along with an isotope table. |
| ChemicalElements.com: Copper: Basic information, atomic structure, and table of isotopes. |
| Copper: Properties and applications along with photographs and chemical formulas of occurrences. |
| Copper: Data tables and historic information. |
| EnvironmentalChemistry.com: Copper: Atomic structure, chemical and physical properties, and table of nuclides. |
| It's Elemental: Copper: Basic physical and historical information. |
| LANL: Copper: History, properties, sources, and uses. |
| Lenntech: Copper: Physical data, chemical properties, health and environmental effects. |
| Radiochemistry of Copper: Full text of the monograph by F. F. Dyer (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] |
| USGS Minerals Information: Copper: Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual Elements: Copper: Image, general and physical information, source, uses, key isotopes, and ionisation energies. |
| WebElements: Copper: Extensive information on history, uses, occurrence, compounds, and properties of the element. |
| Wikipedia: Copper: Properties of the element, including its history, applications, and characteristics. |
Classical
