Radon : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: Radon	by the DICT Development Group
2 results for Radon
From WordNet (r) 3.0 (2006) [wn]:
radon n a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health Synonym(s): radon, Rn, atomic number 86
From The Elements (22Oct97) [elements]:
radon Symbol: Rn Atomic number: 86 Atomic weight: (222) Colorless radioactive gaseous element, belongs to the noble gases. Of the twenty known isotopes, the most stable is Rn-222 with a half-life of 3.8 days. Formed by the radioactive decay of {Radium}-226. Radon itself decays into {polonium}. Used in radiotherapy. As a noble gas, it is effectively inert, though radon fluoride has been synthesized. First isolated in 1908 by Ramsey and Gray.