(From the Greek Kyprios, "Cyprus", noted for its copper mines) A reddish-brown, malleable, ductile, metallic chemical element that is corrosion-resistant and an excellent conductor of electricity and heat.

Symbol: Cu
Atomic number: 29
Atomic weight: 63.546
Density (at room temperature and pressure): 8.96 g/cc
Melting point: 1,084.62°C
Boiling point: 2,567°C
Valence: +1, +2
Ground state electron configuration: [Ar]3d104s1