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- Radioactivity | Definition, Types, Applications, Facts | Britannica
Radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously It is, in essence, an attribute of individual atomic nuclei Radioactive decay is a property of several naturally occurring elements as well as of artificially produced isotopes of the elements
- Radioactivity - Medical, Industrial, Research | Britannica
Radioactivity - Medical, Industrial, Research: Radioisotopes have found extensive use in diagnosis and therapy, and this has given rise to a rapidly growing field called nuclear medicine These radioactive isotopes have proven particularly effective as tracers in certain diagnostic procedures As radioisotopes are identical chemically with stable isotopes of the same element, they can take the
- Radioactive series | Definition Facts | Britannica
Radioactive series, any of four independent sets of unstable heavy atomic nuclei that decay through a sequence of alpha and beta decays until a stable nucleus is achieved These four chains of consecutive parent and daughter nuclei begin and end among elements with atomic numbers higher than 81
- Radioactivity - Natural, Artificial, Decay | Britannica
Radioactivity - Natural, Artificial, Decay: Some species of radioactivity occur naturally on Earth A few species have half-lives comparable to the age of the elements (about 6 × 109 years), so that they have not decayed away after their formation in stars Notable among these are uranium-238, uranium-235, and thorium-232 Also, there is potassium-40, the chief source of irradiation of the
- Radioactive isotope | Description, Uses, Examples | Britannica
Radioactive isotope, any of the species of the same chemical element that have different masses and unstable nuclei that emit radiation
- Radioactive Definition Meaning | Britannica Dictionary
RADIOACTIVE meaning: having or producing a powerful and dangerous form of energy (called radiation)
- radioactivity - Kids | Britannica Kids | Homework Help
Radioactivity is a feature of certain types of matter All matter is made of chemical elements, and elements are made of atoms Most atoms are stable That is, they do not…
- Radioactivity - Decay Rates, Half-Lives, Transitions | Britannica
Radioactivity - Decay Rates, Half-Lives, Transitions: There is a vast range of the rates of radioactive decay, from undetectably slow to unmeasurably short Before considering the factors governing particular decay rates in detail, it seems appropriate to review the mathematical equations governing radioactive decay and the general methods of rate measurement in different ranges of half-life
- radioactive isotope - Students | Britannica Kids | Homework Help
A radioactive isotope is any of several varieties of the same chemical element with different masses whose nuclei are unstable This instability exhibits a large amount of energy, which these isotopes release by spontaneously emitting radiation in the form of alpha, beta, and gamma particles
- Plutonium | Radioactive Element, Nuclear Fuel | Britannica
Plutonium (Pu), radioactive chemical element of the actinoid series of the periodic table, atomic number 94 It is the most important transuranium element because of its use as fuel in certain types of nuclear reactors and as an ingredient in nuclear weapons Plutonium is a silvery metal that takes
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