Iodine charge symbol11/29/2023 ![]() The noble gas configuration is achieved by gaining one electron from reactive surroundings or sharing electrons by covalent bonding. Like other halogens, it has also one electron short of the next noble gas. Iodine has an electron configuration 4d 10 5s 2 5p 5, with seven electrons in the ultimate quantum shell. The final filtrate is distilled with sulfuric acid and manganese dioxide in a cast iron resort for the production of iodine. The solution is concentrated to crystallize other soluble salts. The ash is treated with water and soluble iodide separated from other insoluble materials. Seaweeds are collected, dried, and brunt. The ferrous iodide (FeI 2) solution is chlorinated to form iodine, absorbed by active charcoal or ion exchange resin.The free silver was treated with nitric acid for reuse in the process.The precipitated silver iodide (AgI) is treated with iron powder with the formation of metallic silver and FeI 2.In another method, the iodide is precipitated by the silver nitrate solution. The gas was swept by air and purified by sublimation. In the United States and Japan, natural brines containing iodides may be chlorinated to evolve iodine gas. Iodine productionÄepending upon the sources, it can be produced by different types of processes. Radioactive decay of I-131 is used in nuclear medicine and radiation therapy for the diagnosis and treatment of thyroid gland disorder. The other is radioactive isotopes with a very short half-life. Iodine has thirty-seven known isotopes but only one stable natural isotope like 127I. Ocean water contains I 2 molecule up to the extent of 0.05 ppm but certain marine life like Laminaria and Fucus can concentrate it up to 0.45 percent of their dry weight. Brains contain iodide ions up to 100 ppm. It is less abundant among the halogens group, only 0.46 ppm (61st order). Some properties of the element are given below the table, Iodine Polyatomic cations X 2 + and X 3 + are known for iodine. Except for fluorine, all halogen exhibits several positive oxidation number or state in their oxides, oxoacids, and interhalogen compounds. The non-metallic chemical element, iodine has electronic configuration 4d 10 5s 2 5p 5. It is a member of the halogen family which lies between bromine and astatine. It is placed in group 17 and period 5 in the periodic table. The name of the element suggested by Joseph Louis Gay-Lussac from the Greek word ioeides means violet colored. In 1811, iodine was discovered by the French chemist Bernard Courtois. The essential element iodine is used in our body for making thyroid hormones to control metabolism and many other important biological functions. It is the stable and heaviest member of the halogen family placed below fluorine, chlorine, and bromine.
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