These isotope tables show all of the known

isotope Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numb ...

s of the

chemical element A chemical element is a species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species. Unlike chemical compounds, chemical elements cannot be broken down into simpler sub ...

s, arranged with increasing

atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...

from left to right and increasing

neutron number The neutron number, symbol ''N'', is the number of neutrons in a nuclide. Atomic number (proton number) plus neutron number equals mass number: . The difference between the neutron number and the atomic number is known as the neutron excess: . ...

from top to bottom.

Half lives Half-life (symbol ) is the time required for a quantity (of substance) to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable ato ...

are indicated by the color of each isotope's cell (see color chart in each section). Colored borders indicate half lives of the most stable

nuclear isomer A nuclear isomer is a metastable state of an atomic nucleus, in which one or more nucleons (protons or neutrons) occupy higher energy levels than in the ground state of the same nucleus. "Metastable" describes nuclei whose excited states have ...

states. The data for these tables came from

Brookhaven National Laboratory Brookhaven National Laboratory (BNL) is a United States Department of Energy national laboratory located in Upton, Long Island, and was formally established in 1947 at the site of Camp Upton, a former U.S. Army base and Japanese internment c ...

which has an interactiv
Table of Nuclides
with data on ~3000 nuclides.

Isotopes for elements 0-14

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Isotopes for elements 15-29

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Isotopes for elements 30-44

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Isotopes for elements 45-59

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Isotopes for elements 60-74

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Isotopes for elements 75-89

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Isotopes for elements 90-104

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Isotopes for elements 105-118

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External links

* '
Interactive Chart of Nuclides (Brookhaven National Laboratory)
'' * '
The Lund/LBNL Nuclear Data Search
'' * An isotope table with clickable information on every isotope and its decay routes is available a

* An example of free Universal Nuclide Chart with decay information for over 3000 nuclides is available a
Nucleonica.net
* '
The LIVEChart of Nuclides - IAEA
'' * Links to other charts of nuclides, including printed posters and journal articles, is available a

{{Nuclides navbox Tables of nuclides