Question

which of the following would not be considered a molecule? fe₂o₃ co h₂ nh₃cl

Explanation:

A molecule is formed by the combination of two or more atoms held together by chemical bonds. Fe₂O₃ is iron - oxide, H₂ is hydrogen gas, and NH₃Cl (ammonium chloride) is a compound made of atoms bonded together. Co represents the element cobalt which is a single - atom species in its standard state and not a molecule.

Answer:

Co