Iodineluula

 Iodine

__What is iodine? __ Iodine is a nonmetallic chemical element with the symbol I and atomic number 53. It is largely found in seawater and in some minerals in the earth. Iodine can also be found on earth as the highly water soluable iodide. Because of iodine's low toxicity it is used for proper human nutrition and in the field of medicine. Though, in large amounts iodine can be reactive and toxic. In its pure form iodine is a lustrous metallic grey with a hint of purple. When iodine vaporizes it turns into a blue purple gas which can be quite toxic.On the periodic table Iodine falls under the Halogen group along with fluorine, chlorine, and bromine.

__Chemical Properties: __ __Classification:__ Halogen __Atomic number:__ 53 __Atomic mass: __ 126.904 g.mol __Melting point__: 114 °C __Boiling point:__ 184 °C __Electronegativity: __ 2.5 __Isotopes: __ 15 __Density: __<span style="font-family: Georgia,serif;">4.93 g.cm-3 at 20°C

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__<span style="font-family: Impact,Charcoal,sans-serif; font-size: 250%; line-height: 0px; overflow: hidden;">History: __

<span style="font-family: Georgia,serif; font-size: 120%;">Iodine was discovered in 1811 by a man named Bernard Courtois. At the time France was at war and needed a great amount of saltpeter (gunpowder), saltpowder needed sodium carbonate which can be found by isolating seaweed. Isolating sodium carbonate from seaweed required you to burn the seaweed, the ashes were then washed away by water. To get rid of the waste you were to add sulfuric acid, by mistake one day Courtois added an extra drop of sulfuric acid and a cloud purple vapour occured. Courtois immediately knew this was a new element but the lack of money was stopping him from continuing further research. He decided to give some samples to his friends Nicolas Clement and Charles Bernard Desormes to continue the research on this new element. This new element is now known as __**Iodine**__.

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__<span style="font-family: Impact,Charcoal,sans-serif; font-size: 250%; line-height: 0px; overflow: hidden;">What is Iodine used for? __

<span style="font-family: Georgia,serif; font-size: 120%;">The use of iodine can vary from the production of acetic acid to a disinfectant and water treatment. Here are a couple of examples: <span style="font-family: Georgia,serif; font-size: 120%;">1) **Animal feed** <span style="font-family: Georgia,serif; font-size: 120%;">32 **Health and medical use**

<span style="font-family: Georgia,serif; font-size: 120%;">**__Animal feed:__** Iodine is not directly put in animal feed. A large amount of iodine is used for ethylenediamine dihydroiodide (EDDI) which is a light yellow almost colourless powder that is made up of ethylenediamine and hydrogen iodide. It is added to pet food and cattle feed as an additive.

<span style="font-family: Georgia,serif; font-size: 120%;">**__Health and medical use:__** The elemental iodine is used in the medical field for many different uses. A common use of radioactive iodine is to treat thyroid cancer. It also functions as a tracer to see how the thyroid is working.

__<span style="font-family: Impact,Charcoal,sans-serif; font-size: 250%; line-height: 0px; overflow: hidden;">The environment and Iodine __

<span style="font-family: Georgia,serif; font-size: 14.66px;">Iodine can be naturally found in the ocean, water plants, and sea fishes. Almost half of the natural iodine that exists is found in the oceans. A lot of it escapes from the oceans as iodide as sea spray, methyl iodide, and hydrichloric acid. The ways that Iodine can affect the environment negatively is that if iodine combines with water particles or seeps into the soil. The animals that eat from this soil or the plants that grow from this soil may ingest the iodine and could cause further harm.



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 * __Bibliography:__**

1) [] 2) [|http://en.wikipedia.org/wiki/Iodine#Applications] 3)[] 4)[|http://en.wikipedia.org/wiki/Iodine#Applications]

<span style="font-family: Impact,Charcoal,sans-serif; font-size: 190%;">__Three Reviews:__
 * 1) <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Gasira: Iodine
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">I learned that Iodine is a non metal yet it displays some metallic properties
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Another thing which I learned is that Iodine is most important in medicine and is used in both its radioactive and non-radioactive form
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Lastly, I learned that iodine is sometimes added to table to prevent thyroid disease

<span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;"> 2. Hodo: Rehabilitating lakes
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">I learned that emission of sulphur oxide and nitrogen are largely responsible for the lakes turning acidic
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Another thing which I learned is that acid rain is the main problem which increases the level of the PH in lakes making it more acidic
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Lastly, I learned that once limestone reacts with acid, the acid becomes neutralized helping to protect against acid precipitation

<span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;"> 3. Mining: Fathima B.
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">I learned that mining is one of the main causes of deforestation
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Another thing which I learned is that people who are exposed to toxic waste from the tailings become very ill, develop things such as skin rashes, headaches, vomiting, etc.
 * <span style="font-family: 'Times New Roman',Times,serif; font-size: 110%;">Lastly, I learned that negative impact from mining can affect the earth after many years