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| | The Environmental Literacy Council - Copper |
 | | Copper is classified as a transition metal; a non-combustible solid with a boiling point of 2840 K and a melting point of 1356 K. It is corrosion resistant, non-magnetic, and antibacterial. |
 | | Copper ores were once used as "...pigments and colouring agents for glazes, and it is likely that copper smelting, which dates from around 4300 BC arose from a happy accident during the glazing of stone ornaments called faience in the Middle East. |
 | | Copper is one of the seven classical metals (the others are lead, tin, iron, copper, mercury, silver, and gold) that alchemists linked to the seven days of the week and the seven known celestial bodies. |
| www.enviroliteracy.org /article.php/1029.html (1481 words) |
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