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A member of a set of nuclides having the same atomic number but different mass numbers; equivalently, the same proton number but different neutron numbers.
wp-physics-isotopenlab-physics-isotopeiupac-isotopesiaea-livechartEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Isotopes are nuclides of the same chemical element, hence the same proton number , with different neutron number and mass number.
The target is a member or subtype of the broader source class.
iupac-isotopesiupac-nuclidewp-physics-isotopenlab-physics-isotopewp-physics-nuclideEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Mass spectrograph peaks directly separated isotopes of the same chemical element.
The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.
wp-physics-aston_mass_spectrograph_measurementsnobel-astonThis is an authored directed relation from the source endpoint to the target endpoint.
An isotope becomes a tracer when its distinguishable abundance or decay signature is introduced or observed to follow material through a chemical, biological, or environmental system.
The target is a model, idealization, restricted ansatz, approximation scheme, phenomenological fit, or historical representation used for the source system or theory. It need not have a universal small error parameter and is not thereby a controlled limit or effective theory. The edge label and detail must identify the precise status.
wp-physics-isotopeiupac-isotopeswp-chem-radiochemistryiaea-neutron-activation-analysisThis is an authored directed relation from the source endpoint to the target endpoint.
Isotopic composition is tested by calibrated mass-resolved ion measurements after controlling mass discrimination, isobaric overlap, blanks, chemical preparation, and the isotope-ratio reference convention.
The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.
wp-physics-isotopeiupac-isotopesnist-isotopic-reference-materialsThis is an authored directed relation from the source endpoint to the target endpoint.
A radionuclide is an unstable nuclide and may be an isotope of a specified element; the classification depends on proton and neutron numbers and nuclear state, not chemical behavior alone.
The target is a member or subtype of the broader source class.
wp-chem-radiochemistryiaea-neutron-activation-analysisiupac-gold-book