Radioactivity Radioactive decay or ‘radioactivity’ is a physical process whereby certain unstable nuclei break up or decay spontaneously. Radioactivity is an energetic process. The Valley of Stability In Nuclear Physics parlance, the valley of stability characterises the stability of nuclides to radioactive decay, based on their binding energy. The binding energy is the minimum energy required to disassemble an atom nucleus into its … Continue reading Radioactivity and Matter I →