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By Steven Chrappa

By Steven Chrappa. Discovery of Argon. Discovered by Sir William Ramsay, a Scottish chemist, and Lord Rayleigh, an English chemist in 1894 Was the first inverted gas to be discovered on earth One of the noble elements Comes from the Greek word for inactive, argos meaning inactive.

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By Steven Chrappa

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  1. By Steven Chrappa

  2. Discovery of Argon • Discovered by Sir William Ramsay, a Scottish chemist, and Lord Rayleigh, an English chemist in 1894 • Was the first inverted gas to be discovered on earth • One of the noble elements • Comes from the Greek word for inactive, argos meaning inactive

  3. Characteristics of Argon • Melting Point:83.80 K (-189.35°C or -308.83°F) • Boiling Point:87.30 K (-185.85°C or -302.53°F) • Density:0.0017837 grams per cubic centimeter • Phase at Room Temperature: Gas • Atomic Number:18 • Atomic Weight:39.948 • Element Classification: inverted gas • Symbol: Ar

  4. Earth’s atmosphere contains .94% argon • Argon is found by fractionating liquid air Sourceof Argon

  5. Uses of Argon • Argon is used in electric lights and fluorescent tubes, photo tubes, glow tubes, and in lasers. • Argon is used as an inert gas for welding and cutting, blanketing reactive elements, • Protective (nonreactive) atmosphere for growing crystals of silicon and germanium.

  6. Bohr-Rutherford Diagram Electron Dot Diagram Ar Electron Configuration 1s² 2s² 2p6 3s2 3p6

  7. The End

  8. Bibliography Works Cited "Argon." Periodic. 15 Dec. 2003. US Department of Energy. 28 Nov. 2008 <http:/periodic.lanl.gov/ elements/18.html>. "Argon: the essentials." Web Elements. 29 Dec. 2007. 28 Nov. 2008 <http://www.webelements.com/ argon/>. Gagnon, Steve. "It's Elemental Argon!" Jeffereson Lab. 29 Sept. 2008. 29 Nov. 2008 <http://education.jlab.org/itselemental/ele018.html>.

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