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The Halogens Group 17 on the Periodic Table

The Halogens Group 17 on the Periodic Table By Christine Ngo, Kristal Espana, Rebecca Odusola, Jeremy Bekkouche. The Halogens. Group of nonmetals All elements in this group are reactive Fluorine, Chlorine, Bromine, Iodine and Astatine are all in the halogens group. Fluorine.

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The Halogens Group 17 on the Periodic Table

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  1. The Halogens • Group 17 on the Periodic Table • By Christine Ngo, Kristal Espana, Rebecca Odusola, Jeremy Bekkouche

  2. The Halogens • Group of nonmetals • All elements in this group are reactive • Fluorine, Chlorine, Bromine, Iodine and Astatine are all in the halogens group.

  3. Fluorine • Gas at room temperature and extremely reactive • Isolated by Henri Moissan in 1886 • Can be found in toothpaste and in water systems where they help to prevent tooth decay

  4. Chlorine • Greenish-yellow gas with a noticeable odor • In high concentration it will be toxic • Was used in World War I as a poison gas • Prepared by Scheele in later 1700, proved tobe an element by Davy in 1810 • Used in swimming pools to get rid of any bacteria

  5. Bromine • Reddish-brown fuming liquid with a chlorine-like smell. • Isolated in pure form by Balard in 1826. • Only non-metal that is liquid at normal room conditions. • Can cause painful burns that heal slowly when applied on the skin. • Used for dyes,disinfectants,and photographic chemicals.

  6. Iodine • It was discovered in 1811 by Curtis • Dark gray solid with a faint metallic luster • When heated, it turns to a violet gas • Important element in the human diet • Crucial for a properly working thyroid gland • Used in table salt • Used medically for the thyroid and anything that has to deal with that gland.

  7. Astatine • Last of the known halogens in 1940 by Corson and others at the university in California. • It is radioactive and its name, from the Greek astatos, means “uristable” • Astatine is expected to react like others halogens but less active • Should be a tiny quantities of astatine in the earth's crust.

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