The Thorium Decay Series refers to a sequence of radioactive decay processes that begin with the isotope Thorium-232. This isotope undergoes a series of transformations, ultimately leading to the stable isotope Lead-208. During this decay series, several intermediate isotopes are produced, including Radium-228 and Radon-220, each with its own half-life and decay products. The decay series is characterized by both alpha and beta decay processes, which release energy and radiation. Understanding the Thorium Decay Series is important in fields such as nuclear physics and radiological safety, as it helps in assessing the behavior and risks associated with thorium and its decay products.