Periodic Table Project: Halogens
By: Ethan, Armen, Ryley, and David
Halogen History
Fluorine: 1886, Henri Moissan, was discovered by the search of a chemical substance to attack glass, Paris France
Chlorine: Carl Wilhelm Scheele, 1774, Sheele thought is contained oxygen, Uppsala Sweden
Bromine:1826, Carl Löwig, Heidelberg, was produced by Carl Lowig
Iodine: Barnard Courtois, 1811, was extracting compounds from seaweed and added too much acid and a gas came out and condensed and was solid iodine.
Astatine: University of California, D.R. Corson, K.R. MacKenzie, and E. Segre, 1940
Halogens on the Periodic Table of Elements
Halogens Basic Information
Halogens are normally found in rocks and minerals in the crust of the
halogens exhibit highly variable physical properties. The Halogen family is located on Group 17 on the Periodic Table of Elements.
Valence Electrons
V E Fluorine: 7
V E Chlorine: 7
V E Bromine: 7
V E Iodine: 7Environmental Concerns/Problems
Halogens Pictures
Fluorine
Florine- Melting Point: -220 C and Boiling Point: -188 C
Florine makes metal flow easier and is used in the metal caps that cover your cavities.
Chlorine
Chlorine- Melting Point: -101 C and Boiling Point: -35 C
Chlorine is used to purify water, also it is in table salt.
Bromine
Bromine- Melting Point: -7 C and Boiling Point: 59 C
Bromine is used in electronic devices, furniture, over the counter drugs, bromine is a very effective pesticide, cars, and is a common purifier in swimming pools and hot tubs.
Iodine
Iodine- Melting Point: 114 C and Boiling Point: 184 C
Iodine is used in antiseptics to heal and treat burns and cuts.
Astatine
Astatine- Melting Point: 302 C and Boiling Point: 337 C
Astatine is a radioactive chemical element with the chemical symbol and it occurs on Earth only as the result of the radioactive decay of certain heavier elements
Hyperlinks
http://www.apis.ac.uk/overview/pollutants/overview_halogens.ht
http://www.ask.com/question/bromine-everyday-uses
http://www.chemicool.com/elements/astatine.html
http://www.elementalmatter.info/halogens.htm
http://education.jlab.org/itselemental/ele053.html
http://www.chemtopics.com/elements/halogen/halogen.htm
http://www.chem4kids.com/files/elements/009_speak.html