Results 1 to 10 of about 1,246,929 (320)
A periodic-like table of space groups [PDF]
Acta Crystallographica Section E: Crystallographic Communications, 2023 There are about 100 chemical elements, and 200 space groups, rounding to the nearest hundreds. The elements, by virtue of the iconic periodic table, which hangs in schoolrooms worldwide, are part of our common culture.
Bart Kahr
doaj +4 more sources
On a group-theoretical approach to the periodic table of chemical elements [PDF]
arXiv, 2004 This paper is concerned with the application of the group SO(4,2)xSU(2) to the periodic table of chemical elements. It is shown how the Madelung rule of the atomic shell model can be used for setting up a periodic table that can be further rationalized via the group SO(4,2)xSU(2) and some of its subgroups.
Maurice Kibler
arxiv +7 more sources
Recent Advances in Nanomaterials of Group XIV Elements of Periodic Table in Breast Cancer Treatment [PDF]
Pharmaceutics, 2022 Breast cancer is one of the most common malignancies and a leading cause of cancer-related mortality among women worldwide. The elements of group XIV in the periodic table exhibit a wide range of chemical manners.
Azadeh Hekmat +5 more
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The Periodic Table and the Group SO(4,4) [PDF]
arXivThe periodic system of chemical elements is represented within the framework of the weight diagram of the Lie algebra of the fourth rank of the rotation group of an eight-dimensional pseudo-Euclidean space. The hydrogen realization of the Cartan subalgebra and Weyl generators of the group algebra is studied. The root structure of the subalgebras of the
В. В. Варламов
arxiv +5 more sources
A Group-Theoretical Approach to the Periodic Table of Chemical Elements: Old and New Developments [PDF]
arXiv, 2005 This paper is a companion article to the review paper by the present author devoted to the classification of matter constituents (chemical elements and particles) and published in the first part of the proceedings of The Second Harry Wiener International Memorial Conference (see quant-ph/0310155).
M. Kibler
arxiv +7 more sources
Evaluation of the periodic table as a teaching tool and content for conceptual change in chemical processes [PDF]
Journal of Science and Education, 2023 This study focused on two crucial chemistry concepts, chemical bonding and related reactions. It explored how learners may conceptually use the periodic table in their scientific understanding.
Thabo Mhlongo, Thomas Dipogiso Sedumedi
doaj +3 more sources
The generalized Lindemann melting coefficient [PDF]
Solid State Communications, vol. 318, 113977 (2020), 2020 Lindemann developed the melting temperature theory over 100 years ago, known as the Lindemann criterion. Its main assumption is that melting occurs when the root-mean-square vibration amplitude of ions and atoms in crystals exceeds a critical fraction, h of the inter-atomic spacing in crystals.
Hepburn, Ian +2 more
arxiv +8 more sources
From the Mendeleev periodic table to particle physics and back to the periodic table [PDF]
Foundations of Chemistry 9 (2007) 221-234, 2006 We briefly describe in this paper the passage from Mendeleev's chemistry (1869) to atomic physics (in the 1900's), nuclear physics (in the 1932's) and particle physics (from 1953 to 2006). We show how the consideration of symmetries, largely used in physics since the end of the 1920's, gave rise to a new format of the periodic table in the 1970's. More
A.O. Barut +19 more
arxiv +8 more sources
The Periodic Table and the Platinum Group Metals [PDF]
Platinum Metals Review, 2008 The year 2007 marked the centenary of the death of Dmitri Mendeleev (1834–1907). This article discusses how he and some of his predecessors accommodated the platinum group metals (pgms) in the Periodic Table, and it considers the placing of their three transuranic congeners: hassium ( 108 Hs ...
By W. P. Griffith
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The location and composition of Group 3 of the periodic table [PDF]
Foundations of Chemistry, 2020 AbstractGroup 3 as Sc–Y–La, rather than Sc–Y–Lu, dominates the literature. The history of this situation, including involvement by the IUPAC, is summarised. I step back from the minutiae of physical, chemical, and electronic properties and explore considerations of regularity and symmetry, natural kinds, and quantum mechanics, finding these to be ...
René Vernon
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