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Halogens: Iodine

o Name Origin- Taken from the work ioeides which means “violet colored”

o Number of protons: 53

o Number of electrons: 53

o Discovered by chance (in nature) by Bernard Courtois in 1811.

Sam Sepulveda 5-13

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Halogens: Iodine

Sam Sepulveda 5-13

Common uses:o Silver-Iodine is used to make film used in x-ray cameraso Scientists use silver-iodine to “seed” cloudsto make it rain where it normally would noto Tungsten-iodine is used to make filamentsin electronic light bulbso Iodine is found in the thyroid gland of the throat

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Halogens: Iodine

Sam Sepulveda 5-13

Facts:o In nature every iodine atom has 74

neutronso Iodine has about 14 artificial isotopeso Each year, around 18,000 tons of

iodine isProduced world wideo Common sources of iodine are

nuts(almonds),shellfish(shrimp), and fruits(cucumbers)

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Halogens: Chlorine

o Origin: The element received its name because of it’s color (chlor is a Greek word meaning “yellow-green”)

o Number of protons: 17

o Number of electrons: 17

o Discovered (man-made) by: Carl Wilhelm Scheele in 1774

Selena Thompson 5-14

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Halogens: Chlorine

o Where is Chlorine found? In oceans, salt lakes, huge amounts are found in the ground as halite or rock salt, also found in the human body.

o Common uses of Chlorine: Sterilize drinking water and to disinfect swimming pools

Selena Thompson 5-14

FactsMelting point: -150.7 F (-101.5 C)Boiling point: -29.27 F (-34.04 C)

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Halogens: Chlorine

o Pictures:

Selena Thompson 5-14

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Halogens

Sam Sepulveda 5-13 and Selena Thompson 5-14

Chemical Properties in Common:o Combine readily with other atoms, especially metalso Atoms need to gain one electron to have a complete outer shello Very poor conductorso Never in uncombined form in nature

All Physical Properties are very different

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HalogensBooks Used :o The Elements, Iodine by Leon Grayo The Elements, Chlorine by Susan Watt

Pictures:o http://www.physchem.co.za/data/periodic_table.htmo http://images-of-elements.com/iodine.phpo http://www.bigoven.com/glossary/cucumbero http://www.cancer.gov/cancertopics/pdq/treatment/thyroid/Patient/page1o http://whatscookingamerica.net/ShrimpTips.htmo http://shop.hempspread.com/Almonds-10oz-Almonds.htmo http://www.chemicalelements.com/elements/cl.htmlo http://www.familyleisure.com/Discount-Pool-Supplies/3in-Chlorine-Tablet--4lbo http://www.greener-industry.org.uk/pages/chlorine/1_chlorine_AP.htm