Copper
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Copper is a chemical element; it has 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 co
Nat Copper
A copper disc (99.95% pure) made by continuous casting; etched to reveal crystallites
Unoxidized copper wire (left) and oxidized copper wire (right)
The East Tower of the Royal Observatory, Edinburgh; the original copper was installed in 1894 and the refurbished copper in 1994
Zinc
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Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny blue whitish appearance when surface oxidation is removed. It is t
Copper
…ever described measuring 4.4 × 3.2 × 3.2 cm. Copper is the 26th most abundant element in Earth's crust, representing 50 ppm compared with 75 ppm for zinc, and 14 ppm for lead. Typical background concentrations of copper do not exceed 1 ng/m3 in the atmosphere; 150 mg/kg in soil; 30 mg/kg in vegetation…
Zinc fragment sublimed and 1cm 3 cube
Piece of zinc sheet
Sphalerite (ZnS)
Hot-dipped galvanized steel tie plate. The steel is protected from corrosion by a coating of zinc, a process called galvanization.