- 更多网络例句与周期元素相关的网络例句 [注：此内容来源于网络，仅供参考]
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If one was to look at the Table of Periodic Properties of the Elements, one would notice that the atomic structure of each element is illustrated.
如果是看表的周期性质的元素，人们会发现，原子结构的每个元素说明。
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In Part I, the biharmonic equation are chosen, and the boundary peanlty finite method using piecewise cubic Hermite elements is used to seek their approximate solutions, in particular satisfying the derivative and periodical boundary conditions.
在第一部份里，选择使用片断三次 Hermite元素的边界惩型有限元素法来求解满足边界导数条件和边界周期条件的重调和方程式的近似解。
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Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.
镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。
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The boundary radius of an atom is defined by the classical turning point equation (r=-I, where I denotes the first ionization potential of the atom.
利用MELD从头计算程序与自编程序相结合，分别在HF和CISD水平下计算了第一至第五周期元素的原子及其常见离子的边界半径。
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Research on self - organization of complex system on element periodic table ;2. The formula can be used in calculating thirty quantitives or more of element and its compounds in the same tribe of the element periodic table .
将同系因子1／N用于元素周期表，以N为周期序数，P作为各元素或其化合物的性能，利用公式P＝a＋b／N对周期表中各元素及化合物30多种性能进行拟合，得到了良好的结果。
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Yes, that is, the cyclical nature and the earth elements have been proved to the world four times as the "Periodic Law Update"- the cycle stability of powerful, updated once every 5125 times Nian, update reflects all kinds of disasters in human eyes Pianshi.
有的，那就是元素的周期本质和地球已经像世界证明过四次的"更新周期律"——这个周期稳定的厉害，每5125年遍更新一次，更新体现在人类眼中便是种种灾难。
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Base on above studies, some conclusions were obtained as follows:(1) ore-forming background of the studied ferromanganese crusts are mainly controlled by intensity of Antarctic Bottom Waters and variations of material source;(2) it is confirmed that the ferromanganese crusts are mainly hydrogenetic and their composition are affected by volcanic and continental material simultaneously; there are no obvious phosphatization reconstruction and element reaction occurred in them, so they have important paleoceanological significance;(3) from researches on element occurrence modes in the new-type ferromanganese crusts and the lying sediments, it is proposed that there is no great biological affection on the crusts formation and their composition mainly came from the adsorptive action of the ferromanganese oxides in them;(4) two major types of ore-controlling factors are identified through compilation of ore-controlling factors, which are geological and oceanic factors;(5) considering the long-term variation trends of the crusts composition, combing the U-series and 10Be isotope dating results, it is proposed that the ore-forming processes of ferromanganese crusts in the studied areas can be divided into three major stages (5.6~2.8 Ma, 2.8~2.7 Ma and since 2.7 Ma), and then the activities of AABW since the Late Miocene, changes of input flux coming from volcanic and continental material are confirmed.
通过研究，得出如下结论：(1)研究区铁锰结壳的成矿背景主要受控于南极底流强弱及物源供给的变化；(2)证实铁锰结壳主要为水成成因，同时其物质组成也受一定程度的火山和陆源物质的影响；结壳自形成以来没有遭受到明显的磷酸盐化等成岩后期改造和元素再迁移，具有重要的古海洋学意义；(3)通过新型铁锰结壳及下伏沉积物元素赋存状态的研究，认为生物作用对研究区结壳的形成并没有很大的直接影响，其物质成分主要来自于结壳中铁锰氧化物的吸附作用；(4)在控矿要素的研究中，归纳出了地质与海洋两大类结壳控矿要素；(5)根据结壳成分长周期变化趋势，结合铀系和10Be测年结果，将研究区结壳的形成过程划分为三个主要阶段(5.6~2.8 Ma，2.8~2.7 Ma和2.7 Ma以来)，并确定了晚中新世以来研究区南极底流的活动情况、火山和大陆来源物质输入量的变化。
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The elements of each sequence in odd-periodic perfect almost binary sequence pair are "1" or "-1" with exception of a single zero element, and odd-periodic perfect almost binary sequence pair possess a perfect odd-autocorrelation function.
奇周期最佳几乎二进序列偶中2个序列中均有一个元素为"0"元素，其他元素取值均为"＋1"或"－1"，并且其奇周期自相关函数为单值脉冲函数。
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Through analysis on the structure of valence electron shell,the atom radius,the bonding orbital and other important parameters,this paper discusses the irregularity in the second circle of nonmetal elements and the irregular courses.
本文通过对第二周期元素价电子层结构、原子半径、成键轨道及其重要参数的分析，讨论了第二周期非金属元素的不规则现象，并且分析了产生这些不规则性的原因。
- 更多网络解释与周期元素相关的网络解释 [注：此内容来源于网络，仅供参考]
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columbite：钶铁矿
把有相似化学性质的元素放在同一直行,这就是元素周期表的雏形. 这个表经过多年修订后才成为当代的周期表. 在周期表中,元素是以元素的原子序数排列,最小的排行最先. 表中一横行称为一个周期,一列称为一个族. 存在于矿物钶铁矿(columbite)中.
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periodic distribution：周期广义函数
periodic 周期的 | periodic distribution 周期广义函数 | periodic element 周期元素
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periodic element：周期元素
periodic distribution 周期广义函数 | periodic element 周期元素 | periodic error 周期误差
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periodic system：周期系
periodic precipitation 周期的沉积 | periodic system 周期系 | periodic table of elements 元素周期表
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periodic system：周期系,周期系统
periodic survey 周期性检验 | periodic system 周期系,周期系统 | periodic system of elements 元素周期表
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periodic system of elements：元素周期系
periodic reaction 周期反应 | periodic system of elements 元素周期系 | periodic table 周期表
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periodic system of elements：元素周期表
periodic system 周期系,周期系统 | periodic system of elements 元素周期表 | periodic table 周期表
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primitive period：原始周期
primitive idempotent element 本原幂等元素 | primitive period 原始周期 | primitive period parallelogram 原始周期平行四边形
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strontianite：菱锶矿
这就是元素周期表的雏形. 这个表经过多年修订后才成为当代的周期表. 在周期表中,元素是以元素的原子序数排列,最小的排行最先. 表中一横行称为一个周期,一列称为一个族. 存在于矿物天青石(celestite)和菱锶矿(strontianite)中.
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inner transition element：内过渡元素
ⅠB和ⅡB两族称为ds区元素.第六周期中的镧系和第七周期中的锕系属f区,被称为内过渡元素(inner transition element).第四周期过渡元素与ds区元素的一些基本性质分别列于表17-1与表17-2.医院常用红色Cu2O的生成反应检查糖尿病.所用试剂是CuSO4,