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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. There are also ten known ...
Curium is made in small amounts in nuclear reactors, and by now only kilograms of 242 Cm and 244 Cm have been accumulated, and grams or even milligrams for heavier isotopes. Hence the high price of curium, which has been quoted at 160–185 USD per milligram, [13] with a more recent estimate at US$2,000/g for 242 Cm and US$170/g for 244 Cm. [57 ...
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
Isotopes are nuclides with the same number of protons but differing numbers of neutrons; ... 244 Fm 245 Md 102; 145 230 At 231 Rn ... curium (96 Cm) discovered in 1944,
The darker more stable isotope region departs from the line of protons (Z) = neutrons (N), as the element number Z becomes larger. This is a list of chemical elements by the stability of their isotopes. Of the first 82 elements in the periodic table, 80 have isotopes considered to be stable. [1] Overall, there are 251 known stable isotopes in ...
Mass number [247] Curium in the periodic table; Hydrogen: Helium: ... Isotopes of curium. Main isotopes [5] Decay; ... 244 Cm synth 18.11 y: α: 240 ...
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.
Mass number [244] Plutonium in the ... Curium: Berkelium: ... The main decay modes of isotopes with mass numbers lower than the most stable isotope, 244 Pu, ...