Element Cu has two oxidation states `Cu^(+1)` & `Cu^(+2)` the right order of radii of these ions.

Element Hg has two oxidation states Hg^(+) & Hg^(+2) the right order of radii of these ions is :

The oxidation state of Cu in the 'E' is

What is the oxidation state of : Copper is Cu_2O

What is the common oxidation state of Cu, Ag and Au?

The oxidation state of Cu in [Cu(NH_3)_4]SO_4 is:

What is the oxidation state of Cu in Cu_2O . [-2, +2, +1, -1]

Oxidation states of Cu and Fe in CuFeS_(2) are respectively :

In the compound Yba_(2)Cu_(3)O_(7) which shows superconductivity, what is the oxidation state of Cu ? Assume that the rare earth element yttrium is in its usual +3 oxidation state.