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Lead (82 Pb) has four observationally stable isotopes: 204 Pb, 206 Pb, 207 Pb, 208 Pb. Lead-204 is entirely a primordial nuclide and is not a radiogenic nuclide.The three isotopes lead-206, lead-207, and lead-208 represent the ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the neptunium series ...
Natural lead consists of four stable isotopes with mass numbers of 204, 206, 207, and 208, [38] and traces of six short-lived radioisotopes with mass numbers 209–214 inclusive. The high number of isotopes is consistent with lead's atomic number being even.
Template: Infobox lead isotopes. ... 206 Pb 24.1% stable 207 Pb 22.1% stable ... link1 = product isotope page | pn1 =! product mass number ...
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
Lead consists of four stable isotopes: 204 Pb, 206 Pb, 207 Pb, and 208 Pb. Local variations in uranium/thorium/lead content cause a wide location-specific variation of isotopic ratios for lead from different localities. Lead emitted to the atmosphere by industrial processes has an isotopic composition different from lead in minerals.
Lead is perhaps the best example of a partly radiogenic substance, as all four of its stable isotopes (204 Pb, 206 Pb, 207 Pb, and 208 Pb) are present primordially, in known and fixed ratios. However, 204 Pb is only present primordially, while the other three isotopes may also occur as radiogenic decay products of uranium and thorium .
Both the uranium-235 and uranium-238 series decay into an isotope of lead. The half-life of converting 235 U to 207 Pb is 710 million years, and the half-life of converting 238 U to 206 Pb is 4.47 billion years. Because of high resolution mass-spectroscopy, both chains can be used to date rocks, giving complementary information about the rocks.
Radon-222 itself alpha decays to polonium-218 with a half-life of approximately 3.82 days, making it the most stable isotope of radon. [1] Its final decay product is stable lead-206. In theory, 222 Rn is capable of double beta decay to 222 Ra, and depending on the mass measurement, single beta decay to 222 Fr may also be allowed.