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Copper History
Copper Age Copper occurs naturally as native metallic copper and was known to some of the oldest civilizations on record. The history of copper use is at least 11,000 years old, estimated to have beg ... .
Copper Production
Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Sites include Chuquicamata in Chile, Bingham Canyon Mine in ... .
What is Copper
Copper is a chemical element with symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed ... .
Brass History
Although forms of brass have been in use since prehistory, its true nature as a copper-zinc alloy was not understood until the post medieval period because the zinc vapor which reacted with copper to ... .
What is Brass
Brass is a metal alloy made of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. It is a substitutional alloy: atoms of the two c ... .
