phr. 【化学】原子序号42钼 英语解释 a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel相似短语 atomic number 42 phr. 【化学】原子序号42钼 atomic number 2 phr. 原子量2;氦 atomic No 42 (Mo) 钼 atomic number n.[化...
百度试题 结果1 题目What is the atomic number of an element?ps:Please answered in English 相关知识点: 试题来源: 解析 最佳答案译文,什么是元素的原子序数?It is the number of an element in thePeriodic table of the elements.反馈 收藏
34 An element has an atomic number of 4.Which statement about this element is correct? A A It forms ions by losing electrons. B It has four occupied electron shells in each of its atoms. C It is an unreactive gas at room temperature and pressure. D It is found in Group IV of the...
1947.: ‘Technetium: The element of atomic number 43’, Nature (Lond.) 159 , 24 pp.Technetium: the element of atomic number 43 - unknown authors - 1947Perrier, C. and Segre, E. 1947.: `Technetium: The element of atomic number 43', Nature (Lond.) 159, 24 pp....
The element with atomic number 14 is? A. Silicon B. Phosphorus C. Sulfur D. Chlorine 相关知识点: 试题来源: 解析 A。解析:原子序数为 14 的元素是硅元素。磷元素原子序数为 15,硫元素原子序数为 16,氯元素原子序数为 17。所以答案是 A。
an element is a substance , all of ___ atoms have the same atomic number为什么选whose ? 请高手讲讲..相关知识点: 试题来源: 解析 首先句子后面是作定语的,由主句可以知道,修饰的是主语element.因为atoms是原子的意思,对于元素来说,逻辑关系自然是“元素里的原子”,所以element和atoms具有从属关系,用whose...
Synthesis of a New Element with Atomic Number Z=117 The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes (293)117 and (294)117 were produced in fusion reactions between ... TO Yu,FS Abdullin,PD Bailey,... - 《Physical Review Letters》...
Silveris a transition metal with element symbol Ag and atomic number 47. The element is found in jewelry and currency for its beauty and value and in electronics for its high conductivity and malleability. Silver Basic Facts Atomic Number:47 ...
摘要: Evidence is presented for the possible existence of a superheavy element produced by secondary reactions in a tungsten target bombarded by 24 GeV protons.关键词: n36550* --physics (nuclear)--nuclear properties & reactions, a >= 90--nuclear reactions & scattering n36510 --physics (...
6 (a) An element X has an atomic number of 24 and a relative atomic mass of52.06. The natural element consists of four isotopes. The mass spectrum of the element X produced the following peaks of three of the isotopes on the chart recorder.Percentage83.804.302.4050 51 52 53 54 55 56...