Bates,+Hannah

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Argon


 * Name:** Argon


 * Symbol:** Ar


 * Boiling Point:** -185.85° C, -302.53° F, 87.3 K


 * Melting Point:** -189.36° C, -308.848° F, 83.79 K


 * Density:** 1656 (40 K)


 * Number of protons**: 18


 * Number of electrons:** 18


 * Number of neutrons:** 22


 * Atomic Mass:** 39.95


 * Atomic Number:** 18


 * Electron Configuration:** [|Ne 3s2 3p6]


 * Orbital Notation:** 1s2 2s2 2p6 3s2 3p6


 * Number of Valence Electrons:** 8


 * How it was Discovered:** They were trying to explain why the density of nitrogen which was extracted from the air was different from the nitrogen which was extracted from decomposing ammonia


 * When it was Discovered:** (Hinted finding at 1785) 1894
 * Who Discovered it:** (Sir Henry Cavendish) Lord Rayleigh and William Ramsay


 * Where it's Produced/Processed/Mined:** Found in the atmosphere as a gas (sometimes found in water). It is usually mixed with nitrogen, oxygen and other elements


 * How it's Produced/Processed/Mined:** Liquid nitrogen is separated from liquid oxygen in order to produce Argon


 * Chemical Properties:**
 * Inert
 * Does not react very fast with other elements or compounds
 * Welding, photo tubes


 * Physical Properties:**
 * Colorless in it's solid and liquid state
 * Odorless
 * Slightly soluble in water


 * Compounds it's found in:** In the atmosphere mixed with oxygen, nitrogen and other elements


 * 2 Common Chemical Reactions:** Argon does not react with many things


 * Commercial Uses:** Used in light bulbs and fluorescent tubes


 * Industrial Uses:** Used as an inert shield for arc welding


 * Cost or Value:** $0.5 per 100g in it's pure form


 * Unusual Facts:**
 * The third most abundant atmospheric gas
 * Argon's symbol was A until 1957 when it was changed to Ar
 * The Earth's atmosphere holds 65 trillion metric tons of argon



** Works Cited ** [] Dr. Doug Stewart Oct. 15, 2012
 * Argon Element Facts**

@http://www.webelements.com/argon/ Mark Winter 2012
 * WebElements Periodic Table of the Elements | Argon** **|**

@http://www.rsc.org/periodic-table/element/18/argon Murray Robertson 2011
 * Argon - Element information, properties and uses**

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