Radioactivity/Related Articles

See also changes related to Radioactivity, or pages that link to Radioactivity or to this page or whose text contains "Radioactivity".

---

Parent topics

• Chemical elements [r]: In one sense, refers to species or types of atoms, each species/type distinguished by the number of protons in the nuclei of the atoms belonging to the species/type, each species/type having a unique number of nuclear protons; in another sense, refers to substances, or pieces of matter, each composed of multiple atoms solely of a single species/type. ^[e]

Subtopics

• Acute radiation syndrome [r]: Disease or death caused by whole-body irradiation, over a short period of time, with a significant quantity of penetrating radiation ^[e]
• Alpha particle [r]: helium nucleus; particle of charge 2e and mass 4 u. ^[e]
• Beta particle [r]: A high-energy electron or positron emitted, along with a neutrino, by the decay of an atomic nucleus; a form of ionizing radiation ^[e]
• Fission device [r]: Add brief definition or description
• Fusion device [r]: Add brief definition or description
• Gamma ray [r]: Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during nuclear decay. ^[e]
• Half-life [r]: The amount of time needed for one half of any reactant subject to first-order decomposition to decay. ^[e]
• Instrumentation for radioactivity [r]: Devices that variously detect, measure and characterize radioactivity; they may be intended for field or laboratory use ^[e]
• Ionizing radiation [r]: Subatomic particles or electromagnetic waves that are energetic enough to detach electrons from atoms or molecules, ionizing them. ^[e]
• Isotope [r]: An atom of a chemical element with a specific number of neutrons and hence a specific nuclear mass, such as carbon-14 (¹⁴C). ^[e]
• Neutron [r]: An elementary particle of neutral charge, normally found in the nucleus of chemical elements, but having significant effects when in free flight; the number of neutrons in the nucleus of an element defines its identity as an isotope ^[e]
• Neutrino [r]: A stable fundamental subatomic particle of matter (no internal structure) classified as a lepton; for electron-associated neutrinos evidence pointing to a finite mass less than an electron, lacking electrical charge, extremely non-interacting with matter; evident in three flavors (varieties or types): electron neutrinos, muon neutrinos, and tau neutrinos, each with a charged partner, the electron, the muon, and the tau, respectively. ^[e]
• Radiological weapon [r]: Add brief definition or description
• Units of radioactivity [r]: System of units used to measure different aspects of radioactivity, from the energy of a source to its effect on biological systems ^[e]
• X-ray [r]: An ionizing type of electromagnetic radiation whose absorption or diffraction often used for structural investigations of matter. ^[e]

Other related topics

• Electron [r]: Elementary particle that carries a negative elementary charge −e and has mass 9.109 382 91 × 10⁻³¹ kg. ^[e]
• Neutron [r]: An elementary particle of neutral charge, normally found in the nucleus of chemical elements, but having significant effects when in free flight; the number of neutrons in the nucleus of an element defines its identity as an isotope ^[e]
• Positron [r]: Add brief definition or description
• Proton [r]: A subatomic particle with an electric charge of +1 elementary charge. ^[e]
• Radiology [r]: A physician specialty with a core competence in obtaining and diagnosing by means of instruments that receive energy transmitted through the body; there are a number of subspecialties. ^[e]