Radioactive Decay
Radioactive decay is a fundamental process involving atomic nuclei, wherein they lose energy by emitting radiation and transforming into different elements or isotopes. It plays a critical role in various phenomena such as nuclear fission, radioactivity, and the generation of heat in nuclear reactors. This concept fits seamlessly under the "Radiation" category within Physics, which itself is a branch of Science, as it explores the properties, behaviors, and interactions of radiation with matter, energy, and other physical entities. Radioactive decay serves as an essential mechanism for understanding how atomic nuclei evolve and change over time, contributing significantly to our comprehension of radioactivity, nuclear stability, and other related topics under "Radiation."