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氘(D)是氢的重同位素,氘与氧形成重水(D_2O)及其过氧化物(D_2O_2)。D_2O被用作核反应堆的中子减速剂和获得人造放射性同位素的氘源。D_2O的冰点温度是38℃;沸点温度为101.4℃;密度为1.1:其粘度比普通水大20％。 D_2O不能维持动、植物体的生命。放在D_2O中的鱼死亡;浸泡在D_2O中的种子不发芽。D_2O具有很强的吸水性。普通水中的
Deuterium (D) is a heavy isotope of hydrogen, deuterium and oxygen to form heavy water (D_2O) and its peroxide (D_2O_2). D_2O is used as a neutron moderator for nuclear reactors and as a deuterium source for artificial radioisotopes. D_2O freezing temperature is 38 ℃; boiling temperature of 101.4 ℃; density of 1.1: its viscosity 20% larger than normal water. D_2O can not maintain the life of plants and animals. The fish in D_2O died; the seeds soaked in D_2O did not germinate. D_2O has strong water absorption. Ordinary water