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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 ...
There are three stable "daughter" Pb isotopes that result from the radioactive decay of uranium and thorium in nature; they are 206 Pb, 207 Pb, and 208 Pb. 204 Pb is the only non-radiogenic lead isotope, therefore is not one of the daughter isotopes.
Lead-213 also occurs in the decay chain of neptunium-237. Lead-210 is particularly useful for helping to identify the ages of samples by measuring its ratio to lead-206 (both isotopes are present in a single decay chain). [51] In total, 43 lead isotopes have been synthesized, with mass numbers 178–220. [38]
Pages in category "Isotopes of lead" The following 105 pages are in this category, out of 105 total. ... Lead-206; Lead-206m1; Lead-206m2; Lead-207; Lead-207m; Lead ...
The three naturally-occurring actinide alpha decay chains given below—thorium, uranium/radium (from uranium-238), and actinium (from uranium-235)—each ends with its own specific lead isotope (lead-208, lead-206, and lead-207 respectively).
Specifically, 206 Pb is formed from 238 U, 207 Pb from 235 U, and 208 Pb from 232 Th. In rocks that contain uranium and thorium, the excess amounts of the three heavier lead isotopes allows the rocks to be "dated", thus providing a time estimate for when the rock solidified and the mineral held the ratio of isotopes fixed and in place.
A sharp increase in their premiums would lead many to drop their coverage, leaving them uninsured, she said. The CBO estimates that 22.8 million total Americans will enroll in ACA marketplace ...
The series terminates at lead-206, a stable nuclide at the bottom of the valley of stability. Radioactive decay often proceeds via a sequence of steps known as a decay chain. For example, 238 U decays to 234 Th which decays to 234m Pa and so on, eventually reaching 206 Pb: