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Radon mixed with hydrogen entered the evacuated system through siphon A; mercury is shown in black. Radon was discovered in 1899 by Ernest Rutherford and Robert B. Owens at McGill University in Montreal. [48] It was the fifth radioactive element to be discovered, after uranium, thorium, radium, and polonium.
Lung cancer is the only observed consequence of high concentration radon exposures; both human and animal studies indicate that the lung and respiratory system are the primary targets of radon daughter-induced toxicity. [1] Radon has a short half-life (3.8 days) and decays into other solid particulate radium-series radioactive
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 .
The highest levels of radon in rainwater occur during thunderstorms, and it is hypothesized that radon is concentrated in thunderstorms because it forms some positive ions during thunderstorms. [12] Estimates of the age of raindrops have been obtained from measuring the isotopic abundance of radon's short-lived decay progeny in rainwater. [13]
On Monday, Eric Trump and wife Lara Lea Trump welcomed their second child, a daughter named Carolina Dorothy Trump.
The general population is exposed to small amounts of polonium as a radon daughter in indoor air; the isotopes 214 Po and 218 Po are thought to cause the majority [92] of the estimated 15,000–22,000 lung cancer deaths in the US every year that have been attributed to indoor radon. [93] Tobacco smoking causes additional exposure to polonium. [94]
Naomi Watts and Bill Murray are bringing their real-life friendship back to the big screen.. On Tuesday, Feb. 11, Bleecker Street debuted the trailer for Watts and Murray's new movie The Friend ...
In 2022, a Racine County jury found LaRoche guilty of Johnson-Schroeder’s murder. In February 2024, a judge denied LaRoche’s appeal to overturn her conviction, according to the Racine County ...