Iodine

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=﻿History= ====Iodine was discovered by Bernard Courtois in 1811. He was born to a manufacturer of saltpeter (a vital part of gunpowder). At the time of the Napoleonic Wars, France was at war and saltpeter was in great demand. Saltpeter produced from French niter beds required sodium carbonate, which could be isolated from seaweed washed up on the coasts of Normandy and Brittany. To isolate the sodium carbonate, seaweed was burned and the ash then washed with water. The remaining waste was destroyed by adding sulfuric acid. One day, Courtois added too much sulfuric acid and a cloud of purple vapor rose. Courtois noted that the vapor crystallized on cold surfaces making dark crystals. Courtois suspected that this was a new element but lacked the money to pursue his observations. However he gave samples to his friends, Charles Benard Desormes(1777–1862) and Nicolas Clement (1779–1841), to continue research. He also gave some of the substance to Joeseph Louis Gay-Lussac (1778–1850), a well-known chemist at that time, and to physicst Andre-Marie Ampere (1775–1836). On 29 November 1813, Dersormes and Clément made Courtois’s public discovery.==== =﻿Facts= =Eqautions=
 * 1) ====Iodine form greek iodes meaning ( Violet or Purple ).====
 * 2) ====Apperance lustrous metallic gray, Violet as a gas.====
 * 3) ====Iodine is a ware in the solar system and earth crust.====
 * 4) ====Iodine is used to for household cleaning prouducts as well as in many thyroid medications in order to treat or control thyroid disease/ disorder ( such as hyperthyroidisom).====
 * 5) ====Iodine normally exists such as diatomic molecukes length of 270 pm, one of the longest single bond known.====
 * 6) ====Codine occours in nautre,only two are used as a source for iodine: the calchine, found in chilie. Calchie: Is a sedimentary rock, a hardend deposit of calium cabonate.====
 * 7) ====Iodine is the heavist essetinal element. Element essetinal is micronutrients are nutrients required by humans and other living things throughout life in small quantities to to orchestrate a whole range of physiological functions.====
 * 8) Elemental iodine is used as a disinfectant in various forms.
 * 9) Iodine's main role in animal biology is as constituents of the thyroid hormones, thyoxine(T4) and triiodothyronine (T3). These are made from addition condensation products of the amino acid tyrosine, and are stored prior to release in an iodine-containing protein called thryoglobulin. T4 and T3 contain four and three atoms of iodine per molucle, respectively. The thyroid gland actively absorbs iodide from the blood to make and release these hormones into the blood, actions which are regulated by a second hormone TSH from the pituitary.Thyroid hormones are phylogenetcially very old molecules which are synthesized by most multicllular organisms, and which even have some effect on unicellular organisms.
 * ====2 HI + Cl2 → I2↑ + 2 HCl====

I2 + 2 H2O + SO2 → 2 HI + H2SO42 HI + Cl2 → I2↓ + 2 HCl
> ====2 CuI2 → 2 CuI + I2==== =Pictures=
 * ====Cu2+ + 2 I– → CuI2====

[[image:750px-Diatrizoic_acid_svg.png width="350" height="140"]]this is one of the eqautoins showing ehat it does and how it forms.
the periodic of the elements.this is the creater of iodine.

=﻿Videos= media type="youtube" key="JCTBxUWsKXk" width="425" height="350"media type="youtube" key="E-fs9OwE9Y0" width="425" height="350"