Lead-208 is a stable isotope of the element lead, which has an atomic number of 82. It is one of the end products of the radioactive decay series of uranium and thorium. Lead-208 has a mass number of 208, meaning it contains 126 neutrons and 82 protons in its nucleus. This isotope is non-radioactive and does not undergo further decay, making it useful in various applications, including radiation shielding and as a reference material in scientific research. Its stability and abundance in nature contribute to its significance in both industrial and environmental contexts.