Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; a freshly exposed surface has a reddish-orange color. It is used as a conductor of heat and electricity, a building material, and a constituent of various metal alloys.Symbol: Cu
Atomic number: 29
Electron configuration: [Ar] 3d10 4s1
Melting point: 1,085 °C
Atomic mass: 63.546 ± 0.003 u
Discovered: 9000 BC