10 Things You Didnât Know About Chronic Fatigue Syndrome. Chronic Fatigue Syndrome (CFS) is undeniably complicated in every conceivable way. The disorder has been around for decades, but the medical community has yet to assemble a clear picture of it. The condition is characterized by extreme fatigue that canât be explained by any underlying medical condition.
A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable.
Radioactive waste Materials which are radioactive and for which there is no further use. Radioactivity The spontaneous decay of disintegration of an unstable atomic nucleus accompanied by the emission of radiation. Radioisotope A radioactive isotope. A common term for a radionuclide. Radionuclide A radioactive nuclide. An unstable isotope of an element that decays or disintegrates spontaneously, emitting radiation. Rate meter