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Noble gases reside on the far right column of a traditional periodic table. In the periodic table there are only six noble gases which are located in the group 18 or 8a. [1] The noble gases group is made up of the elements helium, neon, argon, krypton, xenon, and radon. During the 1960's the Noble gases were thought to be inert, which means to be non-reactive. [2] The oxidation number for these gases is 0, which keeps them from making compounds. [3] The outer shell of the noble gases is full which keeps the gases stable and they tend to neither gain nor lose electrons. Their ionization energies are high and their electronegative levels are not really significant. [4] The gases have low boiling points and they all are gases at room temperature. [5]


Helium

Main article: Helium

Helium is the second element in the periodic table.Helium is one of the noble gases, it is also an unrealative, colorless, and odorless monatomic gas. The symbol for Helium is He, and is pronounced as HEE-lee-em. [6] Now the atomic number is two, and the atomic mass is 4,0026 g/mol. When added to water helium becomes less soluble than any other gas. The density and viscosity of helium vapors are lower than others, and the boiling point is lower but weighs more than others as well. There are many uses for helium among us, a few being filling balloons, making neon lasers, leak detectors, and helping flotation devices stay afloat.

Neon

Main article: Neon

Neon is a noble gas discovered by Sir William Ramsay, a Scottish chemist, in 1898. [1] with the help of his student, an English chemist, named Morris W. Travers. Ramsay discovered the element Neon when he chilled a bit of the atmosphere. He did this until it liquefied, then he began to warm up the liquid until it became a gas. From that gas he realized there were actually three gases, they were krypton, xenon, and Neon. After that the French engineer Georges Claude made a lamp from an electrified tube of the Neon gas in 1910. By 1915, Claude was selling his Neon light tubes to many U.S. companies.


Argon

Main article: Argon

Argon was suspected by Henry Cavendish in 1785 but wasn't discovered until 1894 by Sir William Ramsay. [7] The element symbol for argon is Ar and the gas was produced by factorization of liquid air. [8] The element argon has the same solubility as oxygen. When argon is in the form of a gas and liquid it's colorless and odorless. It is also known as a non reactive gas and it can't form a true chemical compound. [8] This element is used in electric light bulbs, florescent lighting, filling photo tubes, and glow tubes. It is also used as a shield when it is an inert gas.

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In 1783 Henry Cavendish was studying nitrous oxide. He began lighting mixtures of nitrogen and oxygen, when he noticed there was always a small bit of nonreactive gas left over. Cavendish later decided to leave it alone for future scientists. [9] Then in 1894 Lord Rayleigh and Sir William Ramsay announced that they had discovered a new nonreactive chemical element called argon,"the lazy one". [10]


Krypton

Main article: Krypton

Krypton was discovered by Sir William Ramsay in 1898. [11]The element symbol for Krypton is Kr. The name krypton comes from the Greek word krypton which means hidden.[12] Krypton is from the production of air and can also makes bright lines of green and orange.[13]Krypton can be used in lamps, photographic flash cubes, stroboscopic lamps, and lighthouses. It also gives off a great amount of light when electricity passes through it.

Xenon

Main article: Xenon

Xenon is a noble gas.

The element xenon was discovered by Sir William Ramsay in 1898 when some residue of liquid air was left behind.[14] The element symbol for Xenon is Xe. Xenon comes from the Greek word xenon which means stranger.[15] The element xenon is used for powerful lamps such as stroboscopic lamps and bactericidal lamps.[16] Its also used in nuclear fields for bubble chambers and when high molecular weight is used. The element xenon is not toxic but its compounds are because of their high oxidizing characteristics.[17]Xenon is five times denser than air.

Radon

Main article: Radon

Radon is a noble gas that was first discovered by Frederich Ernest Dorn in 1900 which he called radium emanation. [18] In 1923 this element was called later renamed radon. The element symbol for radon is Rn. The name radon come from radium. [19] Radon is used in hospitals for therapeutic reasons. They pump radium and seal it in needle but hospitals stopped doing this because they can purchase needles from suppliers.[20] When handling radon people should be extremely careful because when inhaled it could cause health concerns or even death.[21]


References

  1. ↑ Bentor, Y. (2006) Periodic Table: Noble Gases. Retrieved January 21, 2009, from http://www.chemicalelements.com/groups/noblegases.html
  2. ↑ Bentor, Y. (2006) Periodic Table: Noble Gases. Retrieved January 21, 2009, from http://www.chemicalelements.com/groups/noblegases.html
  3. ↑ Bentor, Y. (2006) Periodic Table: Noble Gases. Retrieved January 21, 2009, from http://www.chemicalelements.com/groups/noblegases.html
  4. ↑ Helmenstein, A. Noble Gases. Retrieved January 21, 2009, from http://chemistry.about.com/od/elementgroups/a/noblegases.htm
  5. ↑ Helmenstein, A. Noble Gases. Retrieved January 21, 2009, from http://chemistry.about.com/od/elementgroups/a/noblegases.htm
  6. ↑ Steve Gagnon. Retrieved February 5, 2009. http://education.jlab.org/itselemental/ele002.html
  7. ↑ Bentor, Y. Argon. Retrieved January 21, 2009, from http://www.chemicalelements.com/elements/ar.html
  8. ↑ 8.0 8.1 University of California.(2003). Argon. Retrieved January 21, 2009, from http://periodic.lanl.gov/elements/18.html
  9. ↑ Wilson,G.The History of Noble Gases. Retrieved January 21, 2009,from http://scienceweek.com/2005/sw051216-1.htm
  10. ↑ Wilson,G.The History of Noble Gases. Retrieved January 21, 2009,from http://scienceweek.com/2005/sw051216-1.htm
  11. ↑ University of California.(2003)Krypton. Retrieved January 21, 2009, from http://periodic.lanl.gov/elements/36.html
  12. ↑ Bentor,Y.Krypton.Retrieved January 21, 2009, from http://periodic.lanl.gov/elements/36.html
  13. ↑ University of California.(2003)Krypton. Retrieved January 21, 2009, from http://periodic.lanl.gov/elements/36.html
  14. ↑ University of California.(2003)Xenon.Retrieved January 21, 2009.From http://periodic.lanl.gov/elements/54.html
  15. ↑ Bentor.Y.Xenon.Retrieved January 21, 2009.From http://www.chemicalelements.com/elements/xe.html
  16. ↑ University of California.(2003)Xenon.Retrieved January 21, 2009.From http://periodic.lanl.gov/elements/54.html
  17. ↑ University of California.(2003)Xenon. Retrieved January 21, 2009.From http://periodic.lanl.gov/elements/54.html
  18. ↑ University of California.(2003)Radon.Retrieved January 21,2009.From http://periodic.lanl.gov/elements/86.html
  19. ↑ Bentor.Y.Radon. Retrieved January 21, 2009,from http://www.chemicalelements.com/elements/rn.html
  20. ↑ University of California.(2003)Radon. Retrieved January 21,2009.From http://periodic.lanl.gov/elements/86.html
  21. ↑ University of California.(2003)Radon. Retrieved January 21,2009.From http://periodic.lanl.gov/elements/86.html


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