Lead-206 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 of uranium and thorium, making it significant in the study of nuclear physics and geochronology. This isotope has a mass number of 206, meaning it contains 124 neutrons and 82 protons. Lead-206 is commonly found in nature, particularly in minerals like galena, and is used in various applications, including radiation shielding and as a component in lead-acid batteries.