Discovered : by Bernard Courtois in 1811
             Origin : The name is derived from the Greek 'iodes', meaning violet
             1811-Iodine comes as black, shiny crystals that dissolve in alcohol; the result is sold as an antiseptic solution. Iodine salts (iodides) are used in dyes and photography, as industrial catalysts and in the manufacture of pharmaceuticals. Iodine is also an essential element for humans, who require a daily intake of iodine (as iodide) of about a tenth of a milligramme (only 1/300,000th of an ounce). Our bodies contain up to 20 milligrammes, mainly in the thyroid gland. Normally we get enough from the food we eat, but people eating food grown in areas where the soil lacks iodides can develop a swollen thyroid known as goitre.
             Bernard Courtois observes clouds of purple vapour rising from mother liquor of seaweed ash acidified with sulphuric acid (used as a source of sodium and potassium salts). The vapours condensed on cold surfaces to yield dark crystals with a metallic luster
             1813-Charles-Bernard Desormes and Nicolas Clement report new substance observed by Courtois (1811), after investigating his observations.
             Gay Lussac independantly establishes Iodine as an element. He compares Iodine to Chlorine and hydroiodic acid to hydrochloric acid. It was a commonly held belief that these two elements and their corresponding acids contained Oxygen
             Electrical resistivity [/10-8 W m; or mW cm]: > 1015
             Natural Sources of Iodine-Where does iodine come from? If you said seaweed and burnt sponges you're not totally wrong. Natural sources of iodine include seafoods, vegetables, and in much lesser degrees, cereal. Iodine is present in T3 and T4 (thyroxine) hormones that are the active pr
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