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There are 39 known isotopes of radon (86 Rn), from 193 Rn to 231 Rn; all are radioactive.The most stable isotope is 222 Rn with a half-life of 3.8235 days, which decays into 218 Po
Radon mostly appears with the radium/uranium series (decay chain) (222 Rn), and marginally with the thorium series (220 Rn). The element emanates naturally from the ground, and some building materials, all over the world, wherever traces of uranium or thorium are found, and particularly in regions with soils containing granite or shale , which ...
At that time, radon only referred to the isotope 222 Rn, whereas the names actinon and thoron denoted 219 Rn and 220 Rn, respectively. [7] In 1957, the International Union of Pure and Applied Chemistry (IUPAC) promoted the name radon to refer to the element rather than just 222 Rn; this was done under a new rule concerning isotope naming ...
220 radium-205: 220 fermium-243: 231 polonium-193m: 240 radium-206: 240 astatine-196: 253 uranium-226: 269 nitrogen-19: 271 hassium-266m: 280 nobelium-254m: 280 astatine-194: 286 hassium-275: 290 francium-202: 290 sodium-27: 301 bismuth-203m1: 303 astatine-212: 314 radon-199m: 320 astatine-194m: 323 astatine-195: 328 moscovium-289: 330 francium ...
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 ...
), which is the most common naturally occurring isotope of uranium. It undergoes alpha decay to radon-222, which is also radioactive; the decay chain ultimately terminates at lead-206. Because of its occurrence in the 238 U decay chain, 226 Ra exists naturally at low concentrations in uranium-containing minerals, soil, and groundwater. [3]
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The health effects of radon are harmful, ... The radon (222 Rn) released into the air decays to 210 Pb and other radioisotopes. The levels of 210 Pb can be measured.