Why are copper compounds colourful?

Copper compounds can be blue, green, yellow, brown and black - so how does it produce so many different colours? We find out the answer to this, plus why copper's flame test...
04 March 2011
Presented by Sarah Castor-Perry

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Copper compounds can be blue, green, yellow, brown and black - so how does it produce so many different colours? We find out the answer to this, plus why copper's flame test is green...

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