Jisho

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同位体
Wikipedia definition
1. Isotopes of ytterbiumNaturally occurring ytterbium (Yb) is composed of 7 stable isotopes, Yb, Yb, Yb, Yb, Yb, Yb, and Yb, with Yb being the most abundant. 27 radioisotopes have been characterized, with the most stable being Yb with a half-life of 32.026 days, Yb with a half-life of 4.185 days, and Yb with a half-life of 56.7 hours. All of the remaining radioactive isotopes have half-lives that are less than 2 hours, and the majority of these have half-lives that are less than 20 minutes.
Read “Isotopes of ytterbium” on English Wikipedia
Read “イッテルビウムの同位体” on Japanese Wikipedia
Read “Isotopes of ytterbium” on DBpedia

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