A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that is unstable and known to undergo radioactive decay into a different nuclide, which may be …

Sep 3, 2025 · Every radionuclide emits radiation at its own specific rate, which is measured in terms of half-life. Radioactive half-life is the time required for half of the radioactive atoms …

Radionuclides (or radioactive materials) are a class of chemicals where the nucleus of the atom is unstable. They achieve stability through changes in the nucleus (spontaneous fission, …

Feb 28, 2019 · A radionuclide is an atom (element) with an unstable nucleus (core). The nucleus of the atom has excess energy that is released by different types of radioactive decay.

1 day ago · Understand the unstable atoms that power modern medicine and technology. Explore the physics of nuclear decay, measuring half-life, and the vital uses of radionuclides.

Oct 2, 2015 · A radioactive nuclide or radionuclide is an unstable nuclide and therefore degenerates by emitting ionizing radiation.

22 hours ago · Nuclear medicine uses radionuclides for imaging and therapeutic purposes. These unstable nuclei decay by emitting radiation, which will damage or destroy the cancer cells. …

Mar 25, 2025 · A nuclide is a nuclear-centric term describing an atomic species by its nuclear composition and nuclear energy state. A nuclide has a specific number of protons and …

An unstable isotope of an element that decays or disintegrates spontaneously, thereby emitting radiation. Approximately 5,000 natural and artificial radioisotopes have been identified.

The nuclide that changes and emits radiation is called a radionuclide. These disintegrations are expressed or measured in a unit called a becquerel (Bq). 1 Bq = 1 disintegration per second.