Gourt > Science > Chemistry > Elements > Radon
Radon is a chemical element in the periodic table that has the symbol Rn and atomic number 86. A radioactive noble gas that is formed by the disintegration of radium, radon is one of the heaviest gases and is considered to be a health hazard. The most stable isotope is Rn-222 which has a half-life of 3.8 days and is used in radiotherapy. Radon gas can accumulate in buildings, and drinking water, and cause lung cancer *, causing potentially 20,000 deaths in the European Union each year. Radon is a significant contaminant that impacts indoor air quality worldwide.
Notable characteristics
Essentially chemically inert, but radioactive, radon is the heaviest noble gas and one of the heaviest gases at room temperature. (The heaviest known gas is Uranium hexafluoride, UF6.) At standard temperature and pressure radon is a colorless gas but when it is cooled below its freezing point it has a brilliant phosphorescence which turns yellow as the temperature is lowered and orange-red at the temperature air liquefies.
Natural radon concentrations in Earth's atmosphere are so low that radon-rich water in contact with the atmosphere will continually lose radon by volatilization. Hence, ground water has a higher concentration of Rn-222 than surface water. Likewise, the saturated zone of a soil frequently has a higher radon content than the unsaturated zone due to diffusional losses to the atmosphere.
More on [ Radon ]
Noble Gases :: Elements
Radon :: Air Quality
back to radon. beachh newyears .. maybe sooner.
mzxbevhills (Cholee) Sun, 20 Dec 2009 15:36:36 -0000
back to radon. beachh newyears .. maybe sooner.
How to Install Radon Mitigation System. Garage Attic Radon http://nxy.in/glqmh
harry_potter0 (Emma Watson) Sun, 20 Dec 2009 13:38:30 -0000
How to Install Radon Mitigation System. Garage Attic Radon http://nxy.in/glqmh
@ProfessionalOne We are still waiting for response from seller to our list of requests from the inspection, including the radon mitigation.
LeaderTalk (Becky Robinson) Sun, 20 Dec 2009 12:32:08 -0000
@ProfessionalOne We are still waiting for response from seller to our list of requests from the inspection, including the radon mitigation.
@LeaderTalk Did U get your radon issue squared away?
ProfessionalOne (Michael McClure) Sun, 20 Dec 2009 12:19:22 -0000
@LeaderTalk Did U get your radon issue squared away?
wasabix.org: WHO calls for tighter standards on indoor radon @ who.int http://bit.ly/8Db4UE
wasabix (wasabix) Sun, 20 Dec 2009 11:04:51 -0000
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ChemGlobe: Radon - Electronic, thermal, and steric data along with an isotope table.
Meta Description: [ The chemical element [Rn] - Radon - Datasheet ]
ChemicalElements.com: Radon - Basic information, atomic structure, and table of isotopes.
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EnvironmentalChemistry.com: Radon - Atomic structure, properties, and table of nuclides.
It's Elemental: Radon - Basic physical and historical information.
Meta Description: [ The Element Radon - Basic Physical and Historical Information ]
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Meta Description: [ chemical properties, health and environmental effects of radon ]
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Radon - Data tables and historic information.
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WebElements: Radon - Extensive information on history, uses, occurrence, and properties.
Meta Description: [ This WebElements periodic table page contains key information for the element radon ]
Wikipedia: Radon - Properties of the element, including its history, applications, and characteristics.
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