different from copper or oxygen. similar to both copper and oxygen. similar only to copper. similar only to oxygen.
I gave my students this multiple choice question: Copper (Cu) reacts with oxygen (O) to form copper oxide (CuO). The properties of CuO are most likely

Only one answer is correct among these 4 choices:
- different from copper or oxygen.
- similar to both copper and oxygen.
- similar only to copper.
- similar only to oxygen.

Could you tell me which one is correct?

different from copper or oxygen.