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- Isotope - Wikipedia
The three naturally occurring isotopes of hydrogen The fact that each nuclide has 1 proton makes them all isotopes of hydrogen: the identity of the isotope is given by the number of protons and neutrons From left to right, the isotopes are protium (1 H) with 0 neutrons, deuterium (2 H) with 1 neutron, and tritium (3 H) with 2 neutrons Isotopes are distinct nuclear species (or nuclides) of
- Isotope analysis - Wikipedia
Isotope analysis Magnetic sector mass spectrometer used in isotope ratio analysis, through thermal ionization Isotope analysis is the identification of isotopic signature, abundance of certain stable isotopes of chemical elements within organic and inorganic compounds
- Natural isotopes - Wikipedia
Natural isotopes are either stable isotopes or radioactive isotopes that have a sufficiently long half-life to allow them to exist in substantial concentrations in the Earth (such as bismuth-209, with a half-life of 1 9 × 10 19 years, potassium-40 with a half-life of 1 251 (3) × 10 9 years), daughter products of those isotopes (such as 234 Th, with a half-life of 24 days) or cosmogenic
- Environmental isotopes - Wikipedia
Environmental isotopes The environmental isotopes are a subset of isotopes, both stable and radioactive, which are the object of isotope geochemistry They are primarily used as tracers to see how things move around within the ocean-atmosphere system, within terrestrial biomes, within the Earth's surface, and between these broad domains
- Nuclide - Wikipedia
See Isotope#Notation for an explanation of the notation used for different nuclide or isotope types Nuclear isomers are members of a set of nuclides with equal proton number and equal mass number (thus making them by definition the same isotope), but different states of excitation
- Chemical element - Wikipedia
A chemical element is a species of atom defined by its number of protons The number of protons is called the atomic number of that element For example, oxygen has an atomic number of 8: each oxygen atom has 8 protons in its nucleus Atoms of the same element can have different numbers of neutrons in their nuclei, known as isotopes of the element Atoms of one element can be transformed into
- Stable isotope ratio - Wikipedia
Stable-isotope ratios Measurement of the ratios of naturally occurring stable isotopes (isotope analysis) plays an important role in isotope geochemistry, but stable isotopes (mostly hydrogen, carbon, nitrogen, oxygen and sulfur) are also finding uses in ecological and biological studies
- Monoisotopic element - Wikipedia
Monoisotopic and mononuclidic elements Monoisotopic, but primordial radionuclides exist A monoisotopic element is an element which has one and only one stable isotope (nuclide) There are 26 such elements, listed below Stability is experimentally defined for chemical elements, as all nuclides with atomic numbers over 40 or 66 (depending on definition, see stable nuclide) are theoretically
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