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Contents. Isotopes of curium. Curium (96 Cm) is an artificial element with an atomic number of 96. Because it is an artificial element, a standard atomic weight cannot be given, and it has no stable isotopes. The first isotope synthesized was 242 Cm in 1944, which has 146 neutrons. There are 19 known radioisotopes ranging from 233 Cm to 251 Cm.
Curium is a synthetic chemical element; it has symbol Cm and atomic number 96. This transuranic actinide element was named after eminent scientists Marie and Pierre Curie, both known for their research on radioactivity. Curium was first intentionally made by the team of Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso in 1944, using the ...
Pages in category "Isotopes of curium" The following 22 pages are in this category, out of 22 total. This list may not reflect recent changes. ...
A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus, for example, carbon-13 with 6 protons and 7 neutrons. The nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties, whereas the isotope concept (grouping all atoms of each element) emphasizes chemical over nuclear.
Among 19 isotopes of curium, ranging in mass number from 233 to 251, [58] the most accessible are 242 Cm and 244 Cm; they are α-emitters, but with much shorter lifetime than the americium isotopes. These isotopes emit almost no γ-radiation, but undergo spontaneous fission with the associated emission of neutrons.
Isotopes of carbon (1 C, 21 P) Isotopes of cerium (40 P) Isotopes of chlorine (28 P) Isotopes of chromium (29 P) Isotopes of cobalt (41 P) Isotopes of copernicium (11 P) Isotopes of copper (37 P) Isotopes of curium (22 P)
Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.
Also, a number of ternary oxides of the type M(II)CmO 3 are known, where M stands for a divalent metal, such as barium. Thermal oxidation of trace quantities of curium hydride (CmH 2–3) has been reported to give a volatile form of CmO 2 and the volatile trioxide CmO 3, one of two known examples of the very rare +6 state for curium.