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Isotopes of astatine
Astatine (At) has 33 known isotopes, all of which are radioactive; the range of their mass numbers is from 191 to 223. There exist also 23 metastable excited states. The longest-lived isotope is 210At, which has a half-life of 8.3 hours; the shortest-lived known isotope is 213At, which has a half-life of 125 nanoseconds.
Additional recommended knowledge
Astatine has also been named:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_astatine". A list of authors is available in Wikipedia.|