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| Isotopes of Astatine |
 Notes
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| Astatine has no stable isotopes. |
| Astatine has 41 known isotopes, all of which are radioactive; the longest-lived isotope is 210At which has a half-llife of 8.1 hours. The shortest-lived isotope is 213At which has a half-llife of 125 nanoseconds. |
 Notable Isotopes
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 210At [125 neutrons] |
 Abundance: 100%
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| Half life: 8.1 hours [ Electron Capture ]
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| Decay Energy: 3.981MeV |
| Decays to 210Po.
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| Half life: 8.1 hours [ Alpha Decay ]
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| Decay Energy: 5.631MeV |
| Decays to 206Bi.
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