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Vor 3 Tagen · Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha, beta, and gamma decay.
Vor 3 Tagen · Technetium is a chemical element; it has symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Technetium and promethium are the only radioactive elements whose neighbours in the sense of atomic number are both stable. All available technetium is produced as a synthetic element.
- shiny gray metal
- [97]
- 43
Vor einem Tag · B − L. −1. X. −3. A neutrino ( / njuːˈtriːnoʊ / new-TREE-noh; denoted by the Greek letter ν) is a fermion (an elementary particle with spin of 1 2) that interacts only via the weak interaction and gravity. [2] [3] The neutrino is so named because it is electrically neutral and because its rest mass is so small ( -ino) that it was ...
Vor 3 Tagen · Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon . The method was developed in the late 1940s at the University of Chicago by Willard Libby.
Vor 2 Tagen · Uranium isotopic composition can provide valuable information about the history and provenance of a nuclear material; therefore, uranium isotopic analyses are frequently made in the nuclear forensics, safeguards, and environmental monitoring communities. These measurements have always presented challenges due to the extreme variability in the relative abundance between the major (235U, 238U ...
Vor einem Tag · This is a list of radioactive nuclides (sometimes also called isotopes ), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds. [1]
Vor 4 Tagen · Relativistic quantum mechanics - Wikipedia. Contents. hide. (Top) Combining special relativity and quantum mechanics. Spin and electromagnetically interacting particles. Velocity operator. Relativistic quantum Lagrangians. Relativistic quantum angular momentum. History. See also. Footnotes. References. Further reading. External links.
