A table with the isotopes of all chemical elements. This list contains all naturally occurring isotopes and the most important of the artificially produced isotopes. There are also numerous other artificially generated, highly radioactive isotopes of each element, which have been omitted here. The list also contains the most important nuclear isomers. Isomers can be recognized by the superscript m next to the mass number.
P stands for the atomic number and thus the number of protons, N is the number of neutrons, u is the atomic mass unit. % indicates the natural frequency in percent, where * means that the isotope is only present in traces and - means no natural occurrence. The half-life can be specified in years (a), days (d), hours (h), minutes (min), seconds (s), milliseconds (ms, 10-3s), microseconds (μs, 10-6s) or nanoseconds (ns, 10-9s).
The most common isotope of an element is shown in bold. Radioisotopes (radioactive isotopes) are italic and red, quasi-stable isotopes with extremely long half-lives and very weak radiation are italic and dark red.
No responsibility is taken for the correctness of this information.
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