Oxidation states of the metal in the minerals covellite and chalcocite, respectively are:
I in covellite and I in chalcocite
III in covellite and II in chalcocite
III in covellite and III in chalcocite
II in covellite and II in chalcocite
The minerals covellite and chalcocite both contain the same metal, which is copper , but they have different compositions.
Covellite is copper sulfide . In covellite, copper
has an oxidation state of +1 , and sulfur
has an oxidation state of -2 .
Chalcocite is also a copper sulfide mineral . In chalcocite, copper
has an oxidation state of +1 , and sulfur
has an oxidation state of -2 .
Therefore, the oxidation state of the metal in both covellite and chalcocite is +1.