The Radium Series is a sequence of radioactive isotopes that decay from uranium-226 to lead-210. This series is part of the larger group of decay chains known as the uranium series, which involves several intermediate isotopes, including radium-226 and radon-222. Each isotope in the series undergoes alpha or beta decay, transforming into a different element until it ultimately stabilizes as lead. The series is significant in the study of radioactivity and has implications in fields such as nuclear physics and geology. Understanding the Radium Series helps scientists track the behavior of radioactive materials in nature and assess their potential health risks.