By: Lauren Mill Valley Middle School
Properties Uses Sources History	"If you've got a scrape, don't put on tape, disenfect with iodine!"	Hazards Names in Other Languags Bibliography Glossary
Properties- Chemical Symbol I Atomic Mass 126.9 Melting Pojnt 458.4 K Boiling Point 386.7 K Protons 53 Neutrons 74 Electrons 53 Color Bluish-Black Group Halogens Period 5 Classification Nonmetal State At Room Temperature Solid		Iodine dissolves readily in chloroform, carbon tetrachloride, and carbon disulfide, but not well in water. When iodine reaches high temperatures, it releases a violet gas. It is less reactive than other halogens. Shells- 2, 8, 18, 18, 7.
Uses- It is required in small amounts by plants and animals. It is used to make chemicals in the thyroid gland to regulate the rate of body activity, and without enough iodine, stinted growth can occur. Lack of iodine also causes the thraot to swell, which is called a goitre. Iodine is added to almost all salt, which is sometimes labeled iodized salt. Iodine that is dissolved in alcohol is commonly used as an antiseptic on scrapes and cuts. Iodine is combined with some detergents that say it disenfects as well as cleans.
Sources- Iodine is very common in seawater, and is mainly extractred from old salt seposits. many seaplants, such as seaweed, have large concentrations of iodine, and it is also taken from from those. Iodine is produced in oil-well brines, salt brines, and from Chilean saltpeters. Iodine in the 17th most abundant element in seawater, and the 62nd most abundant element in the earth's crust.
History- Iodine was discovered in 1811 by Bernard Courtois (1777-1838) on the coast of France. He was working with seaweed, and finding iodine was an accident. The word iodine comes from the Greek word iodes, meaning violet.
Hazards- Iodine is poisonous in highly concentrated forms, and too much of it will kill you. It is toxic, so do not digest it. Too much contact with skin can cause lesions. Its vapor irritates the eyes and mucus membranes. Keep away from children.
Names in Other Languages- Latin Iodim Czech Jod Croatian Jod French Iode German Jod-r Italian Iodio Norwegian Jod Spanish Yodo
Bibliography- Books Todd, Robert W. Physical Science. Austyn, Texas. Holt, Rhineheart, and Winston. 2001. Knapp, Brian. Choline, Fleurine, Bromine, and Iodine. Danbury, Conecticut. Grolier Education. 1996. Heiserman, David L. Exploring Chemical elements and Their Compounds. New York. TAB books. 1992. Websites Chemicool Periodic Table Environmental Chemistry Periodic Table Interactive Periodic Table of the Elements Periodic Table Periodic Table of the Elements Pictorial Periodic Table Web Elements Periodic Table Dictionary.com Images www.health.state.ri.us/beaches/ illness_com.form.htm www.lighthouse.chtr.k12.ma.us/ .../iodine.htm doityourself.com/ clean/iodine.htm www.psiwash.org/psi_ops/profile/ 82_salt/salt.htm kancrn.org/stain/ gdata_results.cfm www.pueblo.org/ www.computer.muni.cz/election/ nominees97.htm
Glossary- Halogens -Gruop number 17 of the periodic table of elements, a very reactive group of nonmetals. Lesions -A wound or injury, an infected patch of skin. Chloroform -A colorless liquid used in refrigerants, propellants, and as resins, as a solvent, and as an anesthetic. Carbon Tetrachloride -A poisonous, nonflammable, colorless gas. Used in ire extinguishers. Carbon Disulfide -A clear, flammable liquid. Used to manufacture viscose rayon and cellop hane, as a solvent for fats, rubber, resins, waxes, and sulfer, and in matches, fumigants, and pesticides.