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.
View Full Document. Isotopes â¢ Nuclide â A type of atom characterized by the number of protons and neutrons in the nucleus of every atom of this type. â¢ Isotopes â Atoms with the same number of protons (same element) but containing different numbers of neutrons. â Nuclides with same atomic number but different atomic masses. This preview has intentionally blurred sections.