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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.
204 Pb is the only non-radiogenic lead isotope, therefore is not one of the daughter isotopes. These daughter isotopes are the final decay products of U and Th radioactive decay chains beginning from 238 U (half-life 4.5 Gy), 235 U (half-life 0.70 Gy) and 232 Th (half-life 14 Gy) respectively. With the progress of time, the final decay product ...
D 0 is number of atoms of the daughter isotope in the original or initial composition, N(t) is number of atoms of the parent isotope in the sample at time t (the present), given by N(t) = N 0 e −λt, and; λ is the decay constant of the parent isotope, equal to the inverse of the radioactive half-life of the parent isotope [17] times the ...
Mass number [most stable isotope] hydrogen: 1 H [1.007 84, ... lead [206.14, 207.94] 2 207.2 ± 1. ...
59.1 3.55 hours 10 3 seconds dubnium-270: 1.0 3.6 bismuth-212: 1.0092 3.633 neptunium-240: 1.032 3.72 actinium-229: 1.045 3.76 curium-249: 1.0692 3.849 lead-204m2: 1.12 4.0 gallium-68: 1.1285 4.063 americium-237: 1.22 4.4 mendelevium-256: 1.283 4.62 rutherfordium-267: 1.3 4.7 dubnium-266: 1.33 4.8 californium-255: 1.417 5.10 lead-199: 1.50 5.4 ...
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 .
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.