Isotope - definition
Isotope - definition
An isotope is a variant of an atom of a given chemical element that is characterised by an identical number of protons in the nucleus (i.e. the same atomic number Z), but differs in the number of neutrons and therefore in the mass number (A). This means that isotopes of the same element have almost identical chemical properties due to the structure of their electron shells, but may differ significantly in their physical properties, especially their nuclear properties.
Isotopes are divided into stable and radioactive isotopes. Stable isotopes do not undergo nuclear transformations during observation, whereas radioactive isotopes (radioisotopes) are unstable and emit ionising radiation as a result of spontaneous nuclear transformations such as alpha decay, beta decay or gamma emission. Each radioisotope is characterised by a characteristic half-life, which defines the time after which half of the atoms will have transformed.
Isotopes have a wide range of applications in Others fields of science and technology. In chemistry and molecular biology, they are used as tracers in methods for tracking reactions and metabolic pathways. In geology and archaeology, they are used for isotopic dating, e.g. by radiocarbon dating. In nuclear energy, fissile isotopes such as uranium-235 or plutonium-239 are used. In nuclear medicine, radiation-emitting isotopes are used in diagnostic imaging (PET, SPECT) and targeted cancer therapy.
At the level of the structure of the atomic nucleus, isotopes differ in the configuration of nucleons and the binding energy of the nucleus, which affects their stability and behaviour in nuclear reactions. The isotopes of an element are designated by its mass number, e.g. in the form of the notation ^14C or hydrogen-2 (deuterium). On a macroscopic scale, isotopes can also affect material properties such as thermal conductivity or molar mass, which is important in materials physics and precision engineering.
Transfer Multisort Elektronik (TME) is one of the world’s largest global distributors of electronic components, electrotechnical parts, workshop equipment, and industrial automation. The catalog includes over 1,500,000 products from 1,300 leading manufacturers. TME’s modern logistics centers in Łódź and Rzgów (Poland), with a combined area of over 40,000 m², ship nearly 6,000 packages daily to customers in more than 150 countries.
TME also invests in the development of knowledge and skills of young engineers and electronics enthusiasts through the TME Education project, and supports the tech community by organizing the TechMasterEvent series, promoting innovation and experience exchange.
