Answer:
C. CO
Explanation:
A molecule is a substance that is a combination of two or more atoms through a chemical bond while an element is a substance containing only one type of atom. However, some elements are also considered molecules because of having diatoms such as: Hydrogen, Oxygen, Chlorine, Bromine, Fluorine, Nitrogen and Iodine.
Among the choices above, it is only choice C (Carbon monoxide) that is a molecule. All the other options (Calcium, Cobalt and Copper) are elements. Carbon monoxide is a combination of one atom of carbon and another atom of oxygen.
Answer: b: O2 was the correct one because
Explanation:A molecule is a group of atoms bonded together. Carbon (C), sodium (Na), and helium (He) are all individual atoms. O2 is a molecule because it represents two oxygen atoms bonded together.
