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.
Acarbon atom containing six protons and eightneutrons is Carbon-14. This form, or isotope of carbon is radioactive. Carbon-14 is radioac-tive while Carbon-12 and Carbon-13 are stable.The term nuclide is used to refer to anytype of atom, so that Carbon-12 and Hydrogen-2 are nuclides.