What does the prefix "iodo" signify in the naming of organic compounds?

The prefix "iodo" in organic nomenclature specifically indicates the presence of iodine within a compound. Iodine is represented by the chemical symbol "I," which aligns with the correct answer. In the context of organic chemistry, prefixes such as "iodo" are used to denote the substitution of various halogens or other functional groups within a molecular structure.

When naming a compound that contains an iodine atom, the prefix "iodo" is added before the base name of the compound to indicate this specific substitution. For example, in a compound named "iodobenzene," the "iodo" prefix signifies that an iodine atom is attached to a benzene ring.

Understanding this nomenclature is crucial as it helps in identifying the functional groups and the nature of the compound being discussed.