No. CO is carbon dioxide as a chemical formula, Co is cobalt as a symbol. Carbon Dioxide is CO2 . CO is carbonmonoxide , a tasteless , odorless, POISONOUS gas.
Carbon monoxide is held together by a covalent bond.
CO3 means Lead II If the letters C and O are capital CO if there is no number means carbon oxide
Carbon Monoxide
CO is carbon monoxide, an odorless, colorless gas. Not to be confused with Co, which is cobalt, a metal.