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Table of Isotopes

Table of nuclides complete in standard form, with half lives

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For an overview of available representations, see Table of nuclides.

The isotope table below shows isotopes of the chemical elements, including all isotopes with established half-lives (and some isotopes without clear half-life data). They are arranged with increasing atomic numbers (proton numbers) from left to right and increasing neutron numbers from top to bottom.

Cell color denotes the half-life of each isotope. If a border is present, its color indicates the half-life of the most stable nuclear isomer. If you’ve scrolled so the color legend is not in view, allowing your cursor to dwell over a cell will cause a pop-up text box to indicate that isotope’s half-life. If a cell has a border, dwelling over it will also disclose the half-life of the most stable nuclear isomer state. If the isomer is more stable than the base state, the cell is further outlined in black. Cells at Dirac’s limit to Z (137) are outlined in yellow. A rough calculation of ideal z has been made, those isotopes within .2 of ideal z for a baryon count are outlined in blue. An orange outline is given for isotopes 2.5 (+/- .2) away from the ideal z (forming a pair of lines of isotopes on each side of the blue ideal line). A green outline is given for Tin and Fermium (z of 50 and 100).

Cells representing complete structures are outlined in red. A heavier line is used when the structure is best for the local ridgeline. A dashed red line marks each of the odd symmetric solutions – which have a parity violation and do not correspond to an integer solution. The position of the structures assume all surface monoquarks are ups – solutions with even numbers of surface downs are generally likelier. The red outlined boxes also include a link to a page detailing the structure (click on red ! ), often with pictures. Icons in the red outlined box show a characteristic vertex or face, and connect to nearby icons with some surface downs, or other connections (which are described in the alt text). For instance the cell at (40,40) corresponding to Zirconium 80 is solution S000L4 (the even symmetric solution, layer 4). It has an icon of which also occurs in cells (42,38), (44,36), (46,34), and (48,32), corresponding to Strontium 80 with 2 surface downs, Krypton 80 with 4, Selenium 80 with 6, and Germanium 80 with 8 surface downs. The first structure on a ridgeline that is best fit for a ridge is outlined in turquoise. The outer edge of the table includes links to element information, both the element page from Wikipedia, and the isotope list for the element. To show range of extended solutions, a couple dozen solutions derived from the symmetric layer 6 solution are annoted here. Full lists of solutions are in the complete structure table (linked above). Almost all complete structures have trimmed and extended variants galore. A pink ring surrounds isotopes that are best fit variants (least surface for a baryon count) without being complete structures.

Note – this table was built from the Wikipedia table of isotopes, expanded by isotope data from multiple sources, so may have some inaccuracies. Structure links were built manually, and are even likelier to show human error. Please report errors to the author. Fair use is assumed, no copyright infringement is intended.  Click here for the Isotope Table

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