What are the oxidation states of copper?

Copper can exhibit multiple oxidation states, although the most common oxidation states for copper are +1 and +2.

In the +1 oxidation state, copper is known as cuprous or copper(I). In this state, copper loses one electron and has a partially filled 3d subshell. Compounds containing copper(I) are typically colorless.

In the +2 oxidation state, copper is known as cupric or copper(II). In this state, copper loses two electrons and has a completely filled 3d subshell. Compounds containing copper(II) often exhibit various colors, such as blue or green.

Besides these common oxidation states, copper can also exhibit higher oxidation states, such as +3 or +4, although they are less common and mainly observed in specialized compounds or under specific conditions.

It's worth noting that the oxidation state of copper in a particular compound depends on its chemical environment and the other elements it is bonded to.