What is the common name for the compound CO?

The compound CO is known commonly as carbon monoxide. This name derives from its molecular composition, consisting of one carbon atom bonded to one oxygen atom. The prefix "mono-" indicates the presence of one of that particular element in the formula, which is crucial for distinguishing it from other carbon-oxygen compounds.

In contrast, carbon dioxide (another common compound) is represented by the formula CO₂, indicating two oxygen atoms are bonded to one carbon atom, thus giving it a different molecular structure and properties. Carbon tetrafluoride and carbon disulfide refer to entirely different compounds with differing atoms and ratios, which is why they do not match the given formula CO. Understanding these distinctions in nomenclature is essential for correctly identifying and naming chemical compounds.