1. Kyle Akley, Blake Andreou, Melissa Ehl, Kenny Mintz

2. Origin of the Name Halogen The family name means "salt-forming. They were given the name from the Greek roots Hal- (“salt”) and –gen (“to produce”) because they all produce sodium salts of similar properties.

3. Name is derived from Latin fluere meaning “to flow” Discovered in 1886 by Henri Moissan by electrolyzing Hydrogen Fluorine Fluorine is most well known for constructing fluorides, which prevents tooth decay Fluorine

4. Name is derived from Greek chloros meaning greenish-yellow Discovered in 1774 by C.W. Scheele Chlorine is used in disinfectants, construction of PVC, chloroform, and as an oxidizing agent in many pharmaceutical products. Chlorine

5. Bromine Name is derived from Greek bromos meaning stench Discovered in Montpelier, Vermont in 1826 by A.J. Balard Bromine is used primarily in insecticides and agricultural chemicals. It is also used in flame retardants.

6. Name is derived from Greek iodes meaning violet Discovered in 1811 by Bernard Courtois Used in old photos, printing inks and dyes, and is used in salts as a supplement Iodine

7. Name derived from Greek astatos meaning unstable Discovered in 1940 by D.R. Corson There is no known usage of astatine considering its incredibly high radioactivity Astatine

8. Unique Facts  Greek word “Hals” means salt  Greek word “Gen” means to make  Fluorine is one of the most reactive elements in existence  Simple compounds containing Halogens are Halides  Fluorine gas is deadly: Breathing in.1% Fluorine can cause death

9. Unique Facts  Small amounts of Fluoride are used to prevents tooth decay  Bromium evaporates easily at room temperature, emitting an orange vapor  Bromine emits a very strong, bad odor  Bromine gets its name from the Greek word “Bromos” which means stench  Fluorine, Chlorine, and Iodine are essential for human health and life.

10. Unique Facts  At room temperature, halogens exist in all three forms of matter  Halogens make up the diatomic elements

11. General Characteristics

12. Fluorine Iodine Bromine Chlorine