different from copper or oxygen. similar to both copper and oxygen. similar only to copper. similar only to oxygen.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Copper (Cu) reacts with oxygen (O) to form copper oxide (CuO). The properties of CuO are most likely
Possibilities:
- different from copper or oxygen.
- similar to both copper and oxygen.
- similar only to copper.
- similar only to oxygen.

different from copper or oxygen.