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・ Isotopes of cadmium
・ Isotopes of caesium
・ Isotopes of calcium
・ Isotopes of californium
・ Isotopes of carbon
・ Isotopes of cerium
・ Isotopes of chlorine
・ Isotopes of chromium
・ Isotopes of cobalt
・ Isotopes of copernicium
・ Isotopes of copper
・ Isotopes of curium
・ Isotopes of darmstadtium
・ Isotopes of dubnium
・ Isotopes of dysprosium
Isotopes of einsteinium
・ Isotopes of erbium
・ Isotopes of europium
・ Isotopes of fermium
・ Isotopes of flerovium
・ Isotopes of fluorine
・ Isotopes of francium
・ Isotopes of gadolinium
・ Isotopes of gallium
・ Isotopes of germanium
・ Isotopes of gold
・ Isotopes of hafnium
・ Isotopes of hassium
・ Isotopes of helium
・ Isotopes of holmium


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Isotopes of einsteinium : ウィキペディア英語版
Isotopes of einsteinium
Einsteinium (Es) is a synthetic element, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. The first isotope to be discovered (in nuclear fallout from an H-bomb test) was 253Es in 1952. There are 19 known radioisotopes from 240Es to 258Es, and 3 nuclear isomers (250mEs, 254mEs, and 256mEs). The longest-lived isotope is 252Es with a half-life of 471.7 days, or around 1.293 years.
== Table ==



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