结果1 题目 The number of parent nuclei in a sample of a radioactive element is N at time r.The radioactive element has a half-life2The rate of decay is proportional to A A N Bt○C1/x D:3○ 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
必应词典,为您提供a-radioactive-element的释义,用法,发音,音标,搭配,同义词,反义词和例句等在线英语服务。
百度试题 题目【名词解释】A naturally or artificially produced radioactive isotope of an element 相关知识点: 试题来源: 解析 radioisotope 反馈 收藏
MANUFACTURING PROCEDURE OF A RADIOACTIVE ELEMENT.A method for making a radioactive element including the steps of a) arranging a mold; b) introducing a plurality of radioactive seeds in the mold; c) introducing liquid bioabsorbable support material into the mold; d) solidify the liquid ...
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2【题目】 A radioactive element x decays into a secondradioactive element y which in turn decays into the stable element zT he rate of decay of x equals 02 times the amount of x present.T he rate of decay of y equals o1 times the amount of y present.Initially, there are 10o millig...
What’s true of a radioactive element? FEMALE STUDENT: It decays? It turns into other elements?Oh, so does that explain why it was missing in the periodic table? MALE PROFESSOR: Exactly. Because of its radioactive decay, element 43 doesn't last very long …and therefore… if it ever ...
The half-life of a radioactive substance is the interval in which a sample of the substance is reduced to half of its original mass. Let the initial mass of a sample of a radioactive substance be m0. Let the half-life of ...
The optical appearances suggest that in these spheres the refractive index of the mica has been raised.doi:10.1038/109517a0JOLYJNatureJOLV, J. 1922b. Haloes and Earth-history: a new radio- active element. Nature, 109, 517-518.