Results 201 to 210 of about 312,132 (253)
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Politics at the periodic table
Nature Chemistry, 2021The periodic table of elements should be celebrated not only for the order it brings, but also for the fascinating stories underlying this icon of science, suggests Juris Meija.
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Prediction and the periodic table
Studies in History and Philosophy of Science Part A, 2001Abstract The debate about the relative epistemic weights carried in favour of a theory by predictions of new phenomena as opposed to accommodations of already known phenomena has a long history. We readdress the issue through a detailed re-examination of a particular historical case that has often been discussed in connection with it—that of ...
Eric R. Scerri, John Worrall
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Pure and Applied Chemistry, 2019
Abstract After a compact history of the PT, from Döbereiner’s triads to the theoretical predictions up to element 172, a number of particular issues is discussed: Why may Z = 172 be a limit for stable electron shells? What are the expected stability limits of the nuclear isotopes? When are formally empty atomic orbitals used in molecular
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Abstract After a compact history of the PT, from Döbereiner’s triads to the theoretical predictions up to element 172, a number of particular issues is discussed: Why may Z = 172 be a limit for stable electron shells? What are the expected stability limits of the nuclear isotopes? When are formally empty atomic orbitals used in molecular
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The Periodic Table of the Cosmos
Scientific American, 2011The article discusses the development of a graph, called the Hertzsprung-Russell (H-R) diagram, which is used to plot the luminosity and temperature of stars. According to the author, the diagram classifies stars by their stage of life by creating unique patterns and has helped astronomers deduce that most stars shine as a result of nuclear fusion ...
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Relativity and the periodic table
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020The periodic table provides a deep unifying principle for understanding chemical behaviour by relating the properties of different elements. For those belonging to the fifth and earlier rows, the observations concerning these properties and their interrelationships acquired a sound theoretical basis by the understanding of electronic behaviour provided
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Scientific American, 2013
The article discusses the periodic table of chemical elements. The author argues that the table may be losing its explanatory and predictive power despite the discovery of element 117, which filled the last remaining gap in the periodic table. Topics include the creation of the periodic table in the 1860s by Russian scientist Dmitri Mendeleev, who left
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The article discusses the periodic table of chemical elements. The author argues that the table may be losing its explanatory and predictive power despite the discovery of element 117, which filled the last remaining gap in the periodic table. Topics include the creation of the periodic table in the 1860s by Russian scientist Dmitri Mendeleev, who left
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Computation and the Periodic Table
2009 24th Annual IEEE Symposium on Logic In Computer Science, 2009In physics, Feynman diagrams are used to reason about quantum processes. Similar diagrams can also be used to reason about logic, where they represent proofs, and computation, where they represent programs. With the rise of topological quantum field theory and quantum computation, it became clear that diagrammatic reasoning takes advantage of an ...
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1999
In this article, I’d like to motivate some work that Luis Seco and I have done on the ground-state energy of an atom of atomic number Z ≫ 1. If one ignores relativistic effects, then the mathematical problem is as follows. Fix a nucleus of charge +Z at the origin.
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In this article, I’d like to motivate some work that Luis Seco and I have done on the ground-state energy of an atom of atomic number Z ≫ 1. If one ignores relativistic effects, then the mathematical problem is as follows. Fix a nucleus of charge +Z at the origin.
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The Periodic Table: A Very Short Introduction
2011The periodic table of elements provides an arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties. The Periodic Table: A Very Short Introduction considers what led to the table’s construction and shows how the deeper meaning of its structure gradually became apparent with the ...
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