<Tr> <Td> Melting point </Td> <Td> 1,326 ° C (2,419 ° F; 1,599 K) </Td> </Tr> <Tr> <Td> Boiling point </Td> <Td> 2,000 ° C (3,630 ° F; 2,270 K) </Td> </Tr> <Tr> <Td> Solubility in water </Td> <Td> insoluble </Td> </Tr> <Tr> <Td> Solubility </Td> <Td> soluble in ammonium chloride, potassium cyanide insoluble in alcohol, ammonium hydroxide, ammonium carbonate </Td> </Tr>

What is the charge on copper in cuo and cu2o