What is charge of copper in Cu?

The charge of a copper ion is +2 ....>> or +1 (this is a more abundant oxidation state)

• In Cu2O the ion charge is Cu1+, (cuprous oxide, Cu(I) oxide, oxidation state +1) color brownish red (or yellow, depending on how fine the particles are)
• In CuO the ion charge is Cu2+, (cuprous oxide, Cu(II) oxide, oxidation state +2) color black