Difference between revisions of "Iodine"
ElizabethK (Talk | contribs) (That just about finishes "I". (Iron already has a decent page.)) |
(Both pronunciations refer to the same element) |
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{{Element | name=Iodine | symbol=I | anumber=53 | amass=126.90447 amu | state=Solid | class=Halogen | cstructure=Orthorhombic | density=4.93 g/cm^3 | color=Extremely dark purple | stableisotopes=1 | date=1811 | discname=Barnard Courtois | origname=Greek 'iodes', violet | uses=Pharmaceuticals, food supplements, dyes, catalysts. | obtained=Brine, seaweed. }} | {{Element | name=Iodine | symbol=I | anumber=53 | amass=126.90447 amu | state=Solid | class=Halogen | cstructure=Orthorhombic | density=4.93 g/cm^3 | color=Extremely dark purple | stableisotopes=1 | date=1811 | discname=Barnard Courtois | origname=Greek 'iodes', violet | uses=Pharmaceuticals, food supplements, dyes, catalysts. | obtained=Brine, seaweed. }} | ||
| − | '''Iodine''' ( | + | '''Iodine''' (Pronounced '''eye'''-o-dyne or '''eye'''-o-dean) is a [[chemical element]]. A trace element, it is required by humans for the synthesis of the [[thyroid]] [[hormone]] thyroxin. <ref>http://lpi.oregonstate.edu/infocenter/minerals/iodine/</ref> People who do not get enough iodine in their diet can suffer from goiter, a disease of the thyroid. This is rarely a problem; but to make sure, iodine is often added to salt ("iodized salt".) |
Iodine is a solid which '''sublimes''' at room temperature—it slowly evaporates directly into the gaseous vapor phase, without going through a liquid phase. | Iodine is a solid which '''sublimes''' at room temperature—it slowly evaporates directly into the gaseous vapor phase, without going through a liquid phase. | ||
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It was discovered by accident in 1811, while Barnard Courtois was treating seaweed ash (which contains a significant amount of iodine) with sulfuric acid. | It was discovered by accident in 1811, while Barnard Courtois was treating seaweed ash (which contains a significant amount of iodine) with sulfuric acid. | ||
| − | For a long time a substance called "iodine" | + | For a long time a substance called "iodine" has been used as a household treatment/disinfectant for cuts and scrapes. That is actually '''tincture of iodine''', a dilute solution of potassium iodide in alcohol. |
==References== | ==References== | ||
Revision as of 02:42, July 6, 2011
| Iodine | |
|---|---|
| Properties | |
| Atomic symbol | I |
| Atomic number | 53 |
| Classification | Halogen |
| Atomic mass | 126.90447 amu |
| Number of Stable Isotopes | 1 |
| Density (grams per cc) | 4.93 g/cm^3 |
| Other Information | |
| Date of discovery | 1811 |
| Name of discoverer | Barnard Courtois |
| Name origin | Greek 'iodes', violet |
| Uses | Pharmaceuticals, food supplements, dyes, catalysts. |
| Obtained from | Brine, seaweed. |
Iodine (Pronounced eye-o-dyne or eye-o-dean) is a chemical element. A trace element, it is required by humans for the synthesis of the thyroid hormone thyroxin. [1] People who do not get enough iodine in their diet can suffer from goiter, a disease of the thyroid. This is rarely a problem; but to make sure, iodine is often added to salt ("iodized salt".)
Iodine is a solid which sublimes at room temperature—it slowly evaporates directly into the gaseous vapor phase, without going through a liquid phase.
It was discovered by accident in 1811, while Barnard Courtois was treating seaweed ash (which contains a significant amount of iodine) with sulfuric acid.
For a long time a substance called "iodine" has been used as a household treatment/disinfectant for cuts and scrapes. That is actually tincture of iodine, a dilute solution of potassium iodide in alcohol.
