Definition
"Fissile" describes a material capable of undergoing sustained nuclear fission. This means that when struck by a neutron, the material will split apart, releasing energy and more neutrons. These neutrons then cause more atoms to split, creating a chain reaction. It is crucial for nuclear reactors and weapons. Think of it as a domino effect but with atoms. Only certain isotopes of elements like uranium and plutonium are fissile. ☢️