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・ Isotopes of bismuth
・ Isotopes of bohrium
・ Isotopes of boron
・ Isotopes of bromine
・ 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


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Isotopes of curium : ウィキペディア英語版
Isotopes of curium
Curium (Cm) is an artificial element with an atomic number of 96. Because it is an artificial element, a standard atomic mass cannot be given, and it has no stable isotopes. The first isotope synthesized was 242Cm in 1944, which has 146 neutrons. All of the isotopes are radioactive.
There are 21 known radioisotopes with atomic masses ranging from 232Cm to 252Cm. There are also four known nuclear isomers (243mCm, 244mCm, 245mCm, and 249mCm). The longest-lived isotope is 247Cm, with a half-life of 15.6 million years – several orders of magnitude longer than the half-life of all known nuclei of elements beyond curium in the periodic table. The longest-lived isomer is 244mCm with a half-life of 34 milliseconds.
== Table ==



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