Question

Carbon monoxide (CO) _____.

is an element
is made of two oxygen atoms and two carbon atoms
increases in volume when compressed
is a compound made of oxygen and carbon

Answer 1

D) is a compound made of oxygen and carbon.

Since the second element has mono as the prefix, that means there is only one oxygen atom. And when it’s combined with carbon, it becomes a compound.

Hope this helps!! :))

Answer 2

Is a compound made of oxygen and carbon