Why green coating develops on copper article when exposed to atmosphere
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it means that the copper metal is under going corrosion.the wasting away of a metal layer by layer is called corrosion.copper ware loose their shine and acquire a green coating on them.
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WHEN A COPPER OBJECT REMAINS IN DAMP SIR FOR A CONSIDERABLE TIME,THEN COPPER REACTS SLOWLY WITH THE CARBON DIOXIDE AND WATER VAPOURS OF AIR TO FORM A GREEN COATING OF BASIC COPPER CARBONATE ON THE SURFACE OF THE OBJECT.
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