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OpenStudy (anonymous):
when copper is expossed to air what happens?
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OpenStudy (anonymous):
Oxidation happens, it turns green like the Statue Of Liberty, and most pennies.
OpenStudy (chmvijay):
it become s copper oxide :)
OpenStudy (anonymous):
Over a course of time, copper is oxidized. It takes a while for it to occur of course. That's why older buildings with copper roofs are greeny blue and newer ones aren't.
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