Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: An san nau'ikan nukiliya goma sha tara da isomers uku na nukiliya don einsteinium tare da nauyin atomatik daga 240 zuwa 258. Dukkanin suna da rediyo kuma mafi kwanciyar hankali nucleide, 252Es, yana da rabin rai na kwanaki 471.7. Isotopes masu zaman kansu na gaba sune 254Es (rabin rabi 275.7 days), 255Es (39.8 days) da 253Es (20.47 days). Duk sauran isotopes suna da rabin rai ƙasa da awanni 40, kuma yawancinsu suna lalacewa cikin ƙasa da mintuna 30. Daga cikin isomers uku na nukiliya, mafi kwanciyar hankali shine 254mEs tare da rabin rayuwa na awanni 39.3.  Tambaya: Menene rabin rayuwar 254mEs?
39.3 sa'o'i