Quiroga,+Gabriel

**
 * Gabriel Quiroga **
 * 1st Period **
 * 2/4/2010


 * Iodine (I) **


 * Properties of Element: **

**Melting Point: **** 386.85 K (113.7°C or 236.7°F) **
 * It is a Solid **
 * Atomic #:53 **
 * Atomic Mass: 126.90 **
 * Period Number: ** ** 5 **
 * Group Number: ** ** 17 **
 * Its in the halogen family **
 * Its is a non-metal **
 * Boiling Point: **** 457.55 K (184.4°C or 364.0°F) **
 * Density: ** **4.93 grams per cubic centimeter**
 * History **
 * Courtois was extracting sodium and potassium compounds from seaweed ash. Once these compounds were removed, he added sulfuric acid (H2SO4) to further process the ash. He accidentally added too much acid and a violet colored cloud erupted from the mass. The gas condensed on metal objects in the room, creating solid iodine. Today, iodine is chiefly obtained from deposits of sodium iodate (NaIO3) and sodium periodate (NaIO4) in Chile and Bolivia. **


 * Common Uses **


 * Iodine is used as a test for starch and turns a deep blue when it comes in contact with it. Potassium iodide (KI) is used to make photographic film and, when mixed with iodine in alcohol, as an antiseptic for external wounds. A radioactive isotope of iodine, iodine-131, is used to treat some diseases of the thyroid gland. **


 * References: **

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