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From telluric helix to telluric remix
Foundations of Chemistry ( IF 0.9 ) Pub Date : 2019-02-22 , DOI: 10.1007/s10698-019-09334-7
Philip J. Stewart

The first attempt to represent the Periodic system graphically was the Telluric Helix ( Vis Tellurique ) presented in 1862 by Alexandre-Emile Béguyer de Chancourtois, in which the sequence of elements was wound round a cylinder. This has hardly been attempted since, because the intervals between periodic returns vary in length from 2 to 32 elements, but Charles Janet presented a model wound round four nested cylinders. The rows in Janet’s table are defined by a constant sum of the first two quantum numbers, n and l, so that they end with the s-block, headed by hydrogen and helium. By combining Janet’s table, Edward Mazurs’ version, in which each row represents an electron shell and Valery Tsimmerman’s use of a half square for each element, I have produced a representation that can be printed out and wound round to make a cylinder with manageable dimensions. In the unwound version, I have placed the s-block in the middle, to emphasise its pivotal nature, since it both ends each (n + ℓ) row and contributes electrons to the valence of elements in the next (n + ℓ) row; it thus does not necessarily belong either on the left or the right side of a table. The downward arrows that link subshells within each (n + ℓ) series graphically illustrate the Janet Effect (or Madelung Rule). To acknowledge my debt to Chancourtois, Janet, Mazurs and Tsimmerman, I call my design the ‘Telluric Remix’.

中文翻译:

从大地螺旋到大地混音

第一次以图形方式表示周期系统的尝试是 Alexandre-Emile Béguyer de Chancourtois 于 1862 年提出的 Telluric Helix (Vis Tellurique),其中元素序列围绕一个圆柱体缠绕。此后几乎没有人尝试过,因为周期返回之间的间隔长度从 2 到 32 个元素不等,但 Charles Janet 展示了一个围绕四个嵌套圆柱体的模型。Janet 表中的行由前两个量子数 n 和 l 的常数和定义,因此它们以 s 块结束,以氢和氦为首。通过结合 Janet 的表格,Edward Mazurs 的版本,其中每一行代表一个电子壳层,以及 Valery Tsimmerman 对每个元素使用半个正方形,我制作了一个表示,可以打印出来并缠绕成一个具有可管理尺寸的圆柱体。在展开的版本中,我将 s-block 放在中间,以强调它的关键性质,因为它在每一 (n + ℓ) 行的两端都结束,并为下一个 (n + ℓ) 行的元素的化合价贡献电子; 因此,它不一定属于表格的左侧或右侧。连接每个 (n + ℓ) 系列中的子壳的向下箭头以图形方式说明珍妮特效应(或马德隆规则)。为了感谢 Chancourtois、Janet、Mazurs 和 Tsimmerman,我称我的设计为“Telluric Remix”。因为它在每个 (n + ℓ) 行都结束,并且为下一个 (n + ℓ) 行中元素的化合价贡献了电子;因此,它不一定属于表格的左侧或右侧。连接每个 (n + ℓ) 系列中的子壳的向下箭头以图形方式说明珍妮特效应(或马德隆规则)。为了感谢 Chancourtois、Janet、Mazurs 和 Tsimmerman,我称我的设计为“Telluric Remix”。因为它在每个 (n + ℓ) 行都结束,并且为下一个 (n + ℓ) 行中元素的化合价贡献了电子;因此,它不一定属于表格的左侧或右侧。连接每个 (n + ℓ) 系列中的子壳的向下箭头以图形方式说明珍妮特效应(或马德隆规则)。为了感谢 Chancourtois、Janet、Mazurs 和 Tsimmerman,我称我的设计为“Telluric Remix”。
更新日期:2019-02-22
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