What happends when you mix copper with oxygen?

Question: What happends when you mix copper with oxygen?
- Keywords:
  copper,
  mix,
  oxygen
Asked by mjlover124 to Holly on 16 Jun 2011.
- Holly Shelton answered on 16 Jun 2011:
  
  Hi
  
  This sounds like your homework to me 🙂 Anyway copper plus oxygen forms copper oxide which is a darker colour (brown or green depending on how much it has been oxidised) than the copper colour.

Question: What happends when you mix copper with oxygen?