radon-222


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radon-222

[′rā‚dän ‚tü′twen·tē‚tü]
(nuclear physics)
The isotope of radon having mass number 222, symbol 222Rn, which is a radioactive member of the uranium series with a half-life of 3.82 days.
References in periodicals archive ?
Radon-222 Content of Natural Gas Samples from Upper and Middle Devonian Sandstone and Shale Reservoirs in Pennsylvania: Preliminary Data.
Seasonal variation of radon-222 concentrations in specific locations in Jordan.
Crotts has compared the areas where TLPs have been most frequently sighted to regions where Apollo space missions observed evidence of a short-lived radioactive gas, radon-222, escaping from the Moon's interior - a clear sign that some type of geological activity was going on.
During the 1980s and early 1990s, elevated concentrations of radium-226 and radon-222 in groundwater wells and tap water were reported in Harris County, Texas, particularly in the northwest.
One isotope, radon-222, for example, decays very quickly into polonium-218 after it is released from a magma chamber--it has a half-life of 3.
Alpha particles are emitted by certain radioactive atoms such as Uranium-238, Radium-226 and Radon-222 that occur naturally, in minute quantities, in the environment.
While the uranium and radium in fluorosilicic acid are known carcinogens, two decay products of uranium are even more carcinogenic: radon-222 and polonium-210.
Radon-222 is found virtually everywhere because its predecessors - radium-226 and uranium-238 - are in soil and rocks everywhere.
These observations represented a sequence of decays in a single nucleus, going from radon-222 to polonium-218 to lead-214 to bismuth-214 to polonium-214.
Radon-222 concentrations in the United States--results of sample surveys in five states.