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Both stable isotopes of copper (63 Cu and 65 Cu) have nuclear spin of 3/2−, and thus produce nuclear magnetic resonance spectra, although the spectral lines are broad due to quadrupolar broadening. 63 Cu is the more sensitive nucleus while 65 Cu yields very slightly narrower signals.
Cu with a half-life of 61.83 hours. [24] Seven metastable isomers have been characterized; 68m Cu is the longest-lived with a half-life of 3.8 minutes. Isotopes with a mass number above 64 decay by β −, whereas those with a mass number below 64 decay by β +. 64 Cu, which has a half-life of 12.7 hours, decays both ways. [25] 62 Cu and 64 Cu
Cu 99.9 Annealed 10 32 45 42 Electrical equipment, roofing, screens Cold-drawn 40 45 15 90 Cold-rolled 40 46 5 100 Gilding metal (ASTM B36) Cu 95.0, Zn 5.0 Cold-rolled 50 56 5 114 Coins, bullet jackets: Cartridge brass (ASTM B14, B19, B36, B134, B135) Cu 70.0, Zn 30.0 Cold-rolled 63 76 8 155
Cuprate superconductors usually feature copper oxides in both the oxidation states 3+ and 2+. For example, YBa 2 Cu 3 O 7 is described as Y 3+ (Ba 2+) 2 (Cu 3+)(Cu 2+) 2 (O 2−) 7. The copper 2+ and 3+ ions tend to arrange themselves in a checkerboard pattern, a phenomenon known as charge ordering. [8]
Children with CU traits have distinct problems in emotional and behavioral regulation that distinguish them from other antisocial youth [6] and show more similarity to characteristics found in adult psychopathy. [7] Antisocial youth with CU traits tend to have a range of distinctive cognitive characteristics. [8]
CU (store), a chain of South Korean convenience stores Customs union, a type of intergovernmental trade bloc; ChristianUnion, a political party in the Netherlands; Christian Union (students), a university or college student Christian group
Copper(II) hydroxide is the hydroxide of copper with the chemical formula of Cu(OH) 2.It is a pale greenish blue or bluish green solid. Some forms of copper(II) hydroxide are sold as "stabilized" copper(II) hydroxide, although they likely consist of a mixture of copper(II) carbonate and hydroxide.