an atom. a mixture. an element. a compound.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Two pure substances combine to make a new substance. The new substance cannot be physically separated and has a different boiling point than each of the original substances. This new substance can best be classified as
Possibilities:
- an atom.
- a mixture.
- an element.
- a compound.

a compound.