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At standard temperature and pressure, it forms a monatomic gas with a density of 9.73 kg/m 3, ... Radon gas (222 Rn) at 100% concentration (1 atmosphere, ...
Radon; Density, liquid at boiling point and 1 atm (g/dm ... Radon; Density, gas at 0 °C and 1 atm (g/dm ...
Radon compounds are chemical compounds formed by the element radon (Rn). Radon is a noble gas, i.e. a zero-valence element, and is chemically not very reactive. The 3.8-day half-life of radon-222 makes it useful in physical sciences as a natural tracer. Because radon is a gas under normal circumstances, and its decay-chain parents are not, it ...
[24] [56] (On the other hand, flerovium, despite being in group 14, is predicted to be unusually volatile, which suggests noble gas-like properties.) [57] [58] The noble gases—including helium—can form stable molecular ions in the gas phase. The simplest is the helium hydride molecular ion, HeH +, discovered in 1925. [59]
Radon gas in the natural gas streams concentrate as NORM in gas processing activities. Radon decays to lead-210, then to bismuth-210, polonium-210 and stabilizes with lead-206. Radon decay elements occur as a shiny film on the inner surface of inlet lines, treating units, pumps and valves associated with propylene, ethane and propane processing ...
Radon-222 (222 Rn, Rn-222, historically radium emanation or radon) is the most stable isotope of radon, with a half-life of approximately 3.8 days. It is transient in the decay chain of primordial uranium-238 and is the immediate decay product of radium-226 .
Its immediate decay product is the dense radioactive noble gas radon (specifically the isotope 222 Rn), which is responsible for much of the danger of environmental radium. [14] [b] It is 2.7 million times more radioactive than the same molar amount of natural uranium (mostly uranium-238), due to its proportionally shorter half-life. [15] [16]
Spectral lines of radon: Other properties; Natural occurrence: from decay: Crystal structure ... E172 would be the end of period 8 ("noble gas") and E173 would be the ...