The Sad Story of Lead and Astatine

Lead is the stable end-product of three major nuclear decay chains. In fact, it has the highest atomic number (82) of all the non-radioactive elements. Astatine, on the other hand, is so unstable that it is the rarest naturally-occurring element in the Earth's crust. Its nucleus is so fragile that only microscopic quantities of the…Read more The Sad Story of Lead and Astatine