Lead-208 is a stable isotope of the chemical element lead. It has a mass number of 208, with 82 protons and 126 neutrons and an atomic mass of 207.9766521 g / mol. Its nuclear binding energy is 1636445728 ± 2921 eV.
It is the heaviest of the stable stable isotopes. It also has the peculiarity of having a double magic number when presented in both the number of protons and neutrons.
Lead-208 is the final product of the decay chain of Thorium-232, so it is also known as Thorium D. Thorium disintegration chain
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