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Exploring Argon: The Inert Noble Gas Discovered by Ramsay and Rayleigh

Argon, discovered in 1894 by Sir William Ramsay and Lord Rayleigh, is an inert noble gas that makes up 94% of Earth's atmosphere. With an atomic number of 18 and an atomic weight of 39.948, argon has a melting point of -189.35°C and a boiling point of -185.85°C. Known for its non-reactive nature, argon is widely used in electric lights, fluorescent tubes, and as a protective atmosphere in welding and crystal growth. This fascinating gas, whose name is derived from the Greek word "argos," meaning inactive, plays a crucial role in scientific applications.

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Exploring Argon: The Inert Noble Gas Discovered by Ramsay and Rayleigh

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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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