Copper (Chemical element)

Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color.
Atomic mass63.546 u ± 0.003 u
Melting point1,085 °C
Electron configuration[Ar] 3d104s1
Discovered9000 BC