Table of Nuclides (combined)

Table Of Nuclides (combined)

The various tables below (scroll down) show the known isotopes of the chemical elements. They are arranged with increasing atomic numbers (proton numbers) from left to right and increasing neutron numbers from top to bottom.

For convenience, two different views of the data are available here: “Segmented tables,” and a single “Unitized table (all elements).” Choose whichever one you need from the table of contents, below. The unitized table allows easy visualizion of proton/neutron-count trends but requires simultaneous horizontal and vertical scrolling. The segmented tables permit easier examination of a particular chemical element with much less scrolling. Links are provided to quickly jump between the different sections.

Note the example color legend shown at right. Legends similar to this are provided alongside each table below. Cell color denotes the half-life of each isotope. If you’ve scrolled so a 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.

Cells with colored borders (note the three bottom cells in the color legend at right) denote the half-life of the most stable nuclear isomer state. The color of the border and the associated half-life of the isomer follow the same convention used for isotope half-lives (white, pink, yellow…). In most cases, a cell’s border is different from that of the cell itself. In some cases however—as with the 198Au cell shown here—a cell and its border are the same color so the border’s presence is denoted with a dotted margin. If a cell has a colored border, information on the isomer’s half-life is included in the pop-up text box when your cursor dwells over the cell.

To learn more about nuclides and to obtain a quick tutorial on the distinction between isotopes, isotones, and isobars, see Table of nuclides.