name some of its compounds.
Carbon monoxide, nitric oxide, sulfur dioxide etc
Iodine
carbon monoxide, nitric oxide, and sulfur dioxide 
where does naturally source of iodine come from Seafood, such as fish, seaweeds (such as kelp) and shellfish, dairy products and eggs etc what is the atomic number of this element? 53 how does this element look physically at normal temperature conditions? It exists as a lustrous, purple-black non-metallic solid. name some of its isotopes Iodine-129, iodine-127, iodine-123, iodine-125 etc
wiki:7685912
Iodine [SEP] Chemistry and compounds
Though it is the least reactive of the stable halogens, iodine is still one of the more reactive elements. For example, while chlorine gas will halogenate carbon monoxide, nitric oxide, and sulfur dioxide (to phosgene, nitrosyl chloride, and sulfuryl chloride respectively), iodine will not do so. Furthermore, iodination of metals tends to result in lower oxidation states than chlorination or bromination; for example, rhenium metal reacts with chlorine to form rhenium hexachloride, but with bromine it forms only rhenium pentabromide and iodine can achieve only rhenium tetraiodide. By the same token, however, since iodine has the lowest ionisation energy among the halogens and is the most easily oxidised of them, it has a more significant cationic chemistry and its higher oxidation states are rather more stable than those of bromine and chlorine, for example in iodine heptafluoride.