アスタチンの同位体
1. Isotopes of astatineAstatine (At) has 37 known isotopes, all of which are radioactive; the range of their mass numbers is from 191 to 229. There exist also 23 metastable excited states. The longest-lived isotope is At, which has a half-life of 8.1 hours; the longest-lived isotope existing in naturally occurring decay chains is At with a half-life of 56 seconds. There are 32 known isotopes of astatine, with atomic masses (mass numbers) of 191 and 193–223.
Read “Isotopes of astatine” on English Wikipedia
Read “アスタチンの同位体” on Japanese Wikipedia
Read “Isotopes of astatine” on DBpedia
Read “Isotopes of astatine” on English Wikipedia
Read “アスタチンの同位体” on Japanese Wikipedia
Read “Isotopes of astatine” on DBpedia
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