What Are the Properties of Iodine?

The iodine element 53 of the Periodic Table of the Elements is located in the Periodic Table of the Chemical Elements. Group A of the group is one of the halogen elements. In 1811, French pharmacist Kutva discovered elemental iodine for the first time. Elemental iodine is purple-black crystals, easy to sublimate, easy to sublimate after sublimation. Toxic and corrosive. Iodine element will turn blue-violet with starch. It is mainly used to make drugs, dyes, iodine, test paper and iodine compounds. Iodine is one of the essential trace elements in the human body. The total amount of iodine in healthy adults is 30 milligrams (20-50 milligrams), and the state stipulates that the standard for adding iodine to table salt is 20-30 mg / kg.