The electron structure of transition elements is permanentlydiffcult point of teaching.
过渡元素原子电子层结构是长期困扰教学过程的难点。
At present there are the varied classifications for the transition elements in the domestic and overseas books,which are different.
目前,国内外教科书中对过渡元素的划分方法有多种方式,不尽统一,本文通过对各种划分过渡元素的方法进行分析,说明哪些元素是过渡元素更为合理。
Limited solid solubility of transition elements in binary alloy phase diagram is studied by (using) atomic parameters and artificial neural network.
应用原子参数 人工神经网络方法研究了过渡元素二元合金相图中的有限固溶度问题。
The transition element tribasic heteropoly compounds with Mn as the central atom had been synthesized directly and characterized by IR,UV,XRD and XPS.
用直接法合成了以锰为中心原子的过渡元素和钨的三元杂多配合物,经ICP和TG曲线确定其化学式为K5,6[MnM(OH2)W11O39]·xH2O(M=Mn2+,Fe3+,Co2+,Ni2+,Cu2+,Zn2+和Cd2+),采用IR,UV,XRD和XPS等手段对配合物结构进行了表征,用循环伏安测定了其系列配合物的氧化还原性质,得出系列配合物的氧化性顺序,同时讨论配合物的热稳定性。
In this paper,a new approach to judge molecular configuration of complex for transition elements by VSEPR theory is put forward on the basis of molecular orbit theory.
在分子轨道理论的基础上 ,提出一种应用VSEPR理论判断过渡元素配合物分子构型的方法 ,并对其在八面体场、四面体场中的应用进行了详细的探讨 。
On the basis of adjacency matric and valence environment values(Vi) of bonding atoms, two new connectivity indices (0H and 1 H) have been developed for research on the standard enthalpies of formation for 33 transitional element halides in this paper.
它们与 ３３种过渡元素卤化物标准生成始的直线方程为：与其它指数相比，新指数计算更为准确。
The effect of transition metal on the catalyst for CO high temperature shift reaction was investigated by means of XRD, BET, XPS and catalytic activity measurement.
通过ＸＲＤ，ＢＥＴ和ＸＰＳ表征及反应性能测定表明，铁系高变催化剂中加入的过渡元素能够进入Ｆｅ３Ｏ４晶格形成固溶体，并使催化剂的晶胞参数随着加入元素离子半径的增大而增大，晶粒度明显变小，比表面积增大，起到铬的作用，催化剂的活性和热稳定性提高。
Inductively coupled plasma mass spectrometry was employed to simultaneous detertmine 9 trace necessarytransitional elements(V、Cr、Mn、Fe、Co、Ni、Cu、Zn and Mo)for human in foods.
本文叙述应用ICP-MS法同时测定食品中9种人体必需微量过渡元素(V、Cr、Mn、Fe、Co、Ni、Cu、Zn和Mo)的测定方法。
Based on the investigation of 2004,the paper analyzed the contents of heavy metals and transitional elements in marine sediment in the Sansha Bay.
依据2004年的调查资料,分析了三沙湾海洋沉积物的重金属和过渡元素的含量,对过渡元素的分布特征、过渡元素与重金属的相关性进行了系统研究,并探讨了其环境和物源意义。
This article researches into the contents of color impurities in transitional elements of environment-friendly optical glass in details.
本论文通过研究过渡元素着色杂质：Fe、Mn、Cr、Cu、Ni、Mo、Co对环境友好光学玻璃着色度的影响，得出了环境友好光学玻璃有害杂质在百万分级的定量或半定量控制指标，这一结果对指导光学玻璃制造，提高环境友好玻璃生产的性价比和市场竞争力，具有很大的实用价值和经济价值。
Spin Polarization Effect and Structures for the Transition Elements Molecules;
过渡元素分子的结构和自旋极化效应
Except for the transitional elements, valency electrons are in the outermost electron shell.
除去过渡元素外，价电子位于最外面的电子层。
Study of Eight Essential Transitional Metals for Human in Guangdong Long-boiled Soups;
广东日饮老火汤中人体必需微量过渡元素分析
The mechanism and functions of transition elements(V,Cr,Fe,Co) in TiMnM hydrogen storage alloys
过渡元素V、Cr、Fe、Co在贮氢合金TiMnM中的作用机理
" Iridium： Metallic chemical element, one of the transition elements, chemical symbol Ir, atomic number 77."
铱:金属化学元素，为过渡元素的一种，化学符号Ir，原子序数77。
"Iron: Metallic chemical element, one of the transition elements, chemical symbol Fe, atomic number 26."
铁:金属化学元素,为过渡元素的一种,化学符号Fe,原子序数26。
"Tungsten (or wolfram): Metallic chemical element, one of the transition elements, chemical symbol W, atomic number 74."
钨:金属化学元素,过渡元素之一,化学符号W,原子序数74。
Study on New Transition Element Substituted Heteropoly Complex Composite Materials and Their Photocatalysis
新型过渡元素取代的杂多配合物复合材料及其光催化的研究
Transition element Any chemical element with valence electrons in two shells instead of only one.
过渡元素及其化合物:价电子处在两个壳层而不是一个壳层里的任何化学元素。
" Ligand： Atom, group (see functional group), or molecule attached to a central atom, usually of a transition element, in a coordination or complex compound."
配位体:与一个中心原子相连的原子或分子，通常是过渡元素，形成共价键化合物或复合离子。
Study of ZnO-based Magnetic Semiconductor with High Transition Element Concentration;
高过渡族元素掺杂ZnO基磁性半导体研究
A Study of the Effects of Transition Metals on Catalytic Combustion of Methane
过渡金属元素对甲烷催化燃烧性能影响的研究
Property of Phthalonitrile Derivatives Containing Bonds of Chalcogens
含氧族元素过渡链的邻苯二甲腈衍生物的性能
Synthesis and property of carbon aerogel under addition of transition Metal element catalysis
添加过渡金属元素碳气凝胶的制备及性能
Influencing factors of generation efficiency of volatile hydrides for transition metals and their existing forms
过渡金属元素挥发性氢化物发生效率的影响因素及其存在形态
Synthesis, Structure and Properties of Heteropoly Compounds Containing Transition Metals and Rare;
掺杂过渡金属、稀土元素杂多化合物的合成、结构和性质
Preparation and Magnetism of ZnO Diluted Magnetic Semiconductors Bulk Samples Doped by Transition Metallic Elements Co & Mn;
过渡金属元素Co和Mn掺杂ZnO稀磁半导体块材样品的制备及磁性
The geometrical structure,electronic structure and magnetism of bimetallic Au_nM_2(n=1,2;M=Sc,Ti,V,Cr,Mn,Fe,Co,Ni) clusters
Au和3d过渡金属元素混合团簇结构、电子结构和磁性的研究