Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce...

elements that have one or more stable isotopes. See stable nuclide and primordial nuclide. Unstable nuclides are radioactive and are called radionuclides. Their...

accretion until the present; 286 such nuclides are known. All of the known 251 stable nuclides, plus another 35 nuclides that have half-lives long enough to...

top right cluster of nuclides that contains isotopes far more stable than other transuranic elements. There are no stable nuclides having an equal number...

radiogenic nuclide is a nuclide that is produced by a process of radioactive decay. It may itself be radioactive (a radionuclide) or stable (a stable nuclide)....

Isotopes are distinct nuclear species (or nuclides) of the same chemical element. They have the same atomic number (number of protons in their nuclei)...

an electron from another atom. The radioactive decay can produce a stable nuclide or will sometimes produce a new unstable radionuclide which may undergo...

In theory, no two stable nuclides have the same mass number (since no two nuclides that have the same mass number are both stable to beta decay and double...

cosmogenic nuclides, scientists are able to gain insight into a range of geological and astronomical processes. There are both radioactive and stable cosmogenic...

Beta-decay stable isobars are the set of nuclides which cannot undergo beta decay, that is, the transformation of a neutron to a proton or a proton to...

occurring nuclides comprise the radioactive primordial nuclides. The total number of primordial nuclides is then 251 (the stable nuclides) plus the 35...

"proton" to "n" for "neutron". The largest numbers of observationally stable nuclides exist for isotones 50 (five: 86Kr, 88Sr, 89Y, 90Zr, 92Mo – noting also...

This list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. This represents isotopes...

usually not fissile (but are fissionable with fast neutrons). Only 58 stable nuclides have an odd neutron number, compared to 194 with an even neutron number...

The term stable isotope has a meaning similar to stable nuclide, but is preferably used when speaking of nuclides of a specific element. Hence, the plural...

part of the valley corresponding to the region of most stable nuclei. The line of stable nuclides down the center of the valley of stability is known as...

nuclear force. Only nuclides are considered to decay and produce radioactivity.: 568  Nuclides can be stable or unstable. Unstable nuclides decay, possibly...

naturally on Earth essentially as a single nuclide (which may, or may not, be a stable nuclide). This single nuclide will have a characteristic atomic mass...

proton has never been observed to decay, so 1H is considered stable. It is the only stable nuclide with no neutrons. Some Grand Unified Theories proposed in...

A monoisotopic element is an element which has only a single stable isotope (nuclide). There are 26 such elements, as listed. Stability is experimentally...

daughter product, daughter isotope, radio-daughter, or daughter nuclide) is the remaining nuclide left over from radioactive decay. Radioactive decay often...

There are 145 stable even–even nuclides, forming ~58% of the 251 stable nuclides. There are also 22 primordial long-lived even–even nuclides. As a result...

this process, unstable atoms obtain a more stable ratio of protons to neutrons. The probability of a nuclide decaying due to beta and other forms of decay...

It is predicted to appear as an "island" in the chart of nuclides, separated from known stable and long-lived primordial radionuclides. Its theoretical...

mass differences on the order of a few electron masses. If possible, a nuclide will undergo beta decay to an adjacent isobar with lower mass. In the absence...

the nuclides are therefore unstable toward spontaneous fission-type processes. In practice, this mode of decay has only been observed in nuclides considerably...

the heaviest nuclide with a half-life of at least four years before the "sea of instability". Excluding those "classically stable" nuclides with half-lives...

of the isotopes must be radioactive. Two nuclides that have the same mass number (isobars) can both be stable only if their atomic numbers differ by more...

the heaviest nuclide with a half-life of at least four years before the "sea of instability". Excluding those "classically stable" nuclides with half-lives...

initially present nuclides (seed nuclei). In a p-process it is suggested that p-nuclei were made through a few proton captures on stable nuclides. The seed nuclei...