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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.
A synthetic, radioactive element, curium is a hard, dense metal with a silvery-white appearance and physical and chemical properties resembling gadolinium. Its melting point of 1344 °C is significantly higher than that of the previous elements neptunium (637 °C), plutonium (639 °C) and americium (1176 °C).
Magnetic sector mass spectrometer used in isotope ratio analysis, through thermal ionization. Isotope analysis is the identification of isotopic signature, abundance of certain stable isotopes of chemical elements within organic and inorganic compounds. Isotopic analysis can be used to understand the flow of energy through a food web, to ...
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. ...
Infobox references. Curium (III) oxide is a compound composed of curium and oxygen with the chemical formula Cm2O3. It is a crystalline solid with a unit cell that contains two curium atoms and three oxygen atoms. The simplest synthesis equation involves the reaction of curium (III) metal with O 2−: 2 Cm 3+ + 3 O 2− ---> Cm 2 O 3. [1]
The superconductive properties are strongly dependent on the purity of the niobium metal. [35] When very pure, it is comparatively soft and ductile, but impurities make it harder. [36] The metal has a low capture cross-section for thermal neutrons; [37] thus it is used in the nuclear industries where neutron transparent structures are desired. [38]
Curium (IV) oxide. [O-2]. [O-2]. [Cm+4] Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Curium (IV) oxide is an inorganic chemical compound of curium and oxygen with the chemical formula CmO2. Since all isotopes of curium are man-made, the compound does not occur in nature.
Curium readily reacts with oxygen forming mostly Cm 2 O 3 and CmO 2 oxides, but the divalent oxide CmO is also known. Black CmO 2 can be obtained by burning curium oxalate (Cm 2 (C 2 O 4) 3), nitrate (Cm(NO 3) 3), or hydroxide in pure oxygen. Upon heating to 600–650 °C in vacuum (about 0.01 Pa), it transforms into the whitish Cm 2 O 3: