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The Place of Zinc, Cadmium, and Mercury in the Periodic Table
Information • Textbooks • Media • Resources The Place of Zinc, Cadmium, and Mercury in the Periodic Table William B. Jensen Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221-0172; [email protected] One of the few facts that I can remember from my un- a quarter of the more recent introductory inorganic texts. In dergraduate inorganic course was my instructor’s insistence all cases, the Zn group was incorrectly labeled as being a mem- that zinc, cadmium, and mercury should be classified as main- ber of the d block or transition block. Those introductory block elements rather than as transition-block or d-block el- inorganic texts that presented some sort of systematic survey ements. Though I have always assumed that the evidence for of descriptive chemistry usually contradicted this assignment this statement was unambiguous, I have also noticed the ap- in their later discussions of the chemistry of these elements. pearance over the last decade of an increasing number of gen- On the other hand, the surveys of descriptive chemistry found eral chemistry texts, inorganic texts, and advanced inorganic in most of the general chemistry texts were so superficial that monographs that either explicitly or implicitly contradict this the existence of this inconsistency seldom became explicit. assignment. The inorganic textbook by Cotton and In light of these trends, I thought it might be of interest Wilkinson, which has served as the American standard for to summarize the evidence relating to the proper placement nearly 40 years, has always been firm in its treatment of the of the Zn group within the periodic table. -
Otto Sackur's Pioneering Exploits in the Quantum Theory Of
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Catalogo dei prodotti della ricerca Chapter 3 Putting the Quantum to Work: Otto Sackur’s Pioneering Exploits in the Quantum Theory of Gases Massimiliano Badino and Bretislav Friedrich After its appearance in the context of radiation theory, the quantum hypothesis rapidly diffused into other fields. By 1910, the crisis of classical traditions of physics and chemistry—while taking the quantum into account—became increas- ingly evident. The First Solvay Conference in 1911 pushed quantum theory to the fore, and many leading physicists responded by embracing the quantum hypoth- esis as a way to solve outstanding problems in the theory of matter. Until about 1910, quantum physics had drawn much of its inspiration from two sources. The first was the complex formal machinery connected with Max Planck’s theory of radiation and, above all, its close relationship with probabilis- tic arguments and statistical mechanics. The fledgling 1900–1901 version of this theory hinged on the application of Ludwig Boltzmann’s 1877 combinatorial pro- cedure to determine the state of maximum probability for a set of oscillators. In his 1906 book on heat radiation, Planck made the connection with gas theory even tighter. To illustrate the use of the procedure Boltzmann originally developed for an ideal gas, Planck showed how to extend the analysis of the phase space, com- monplace among practitioners of statistical mechanics, to electromagnetic oscil- lators (Planck 1906, 140–148). In doing so, Planck identified a crucial difference between the phase space of the gas molecules and that of oscillators used in quan- tum theory. -
Three Related Topics on the Periodic Tables of Elements
Three related topics on the periodic tables of elements Yoshiteru Maeno*, Kouichi Hagino, and Takehiko Ishiguro Department of physics, Kyoto University, Kyoto 606-8502, Japan * [email protected] (The Foundations of Chemistry: received 30 May 2020; accepted 31 July 2020) Abstaract: A large variety of periodic tables of the chemical elements have been proposed. It was Mendeleev who proposed a periodic table based on the extensive periodic law and predicted a number of unknown elements at that time. The periodic table currently used worldwide is of a long form pioneered by Werner in 1905. As the first topic, we describe the work of Pfeiffer (1920), who refined Werner’s work and rearranged the rare-earth elements in a separate table below the main table for convenience. Today’s widely used periodic table essentially inherits Pfeiffer’s arrangements. Although long-form tables more precisely represent electron orbitals around a nucleus, they lose some of the features of Mendeleev’s short-form table to express similarities of chemical properties of elements when forming compounds. As the second topic, we compare various three-dimensional helical periodic tables that resolve some of the shortcomings of the long-form periodic tables in this respect. In particular, we explain how the 3D periodic table “Elementouch” (Maeno 2001), which combines the s- and p-blocks into one tube, can recover features of Mendeleev’s periodic law. Finally we introduce a topic on the recently proposed nuclear periodic table based on the proton magic numbers (Hagino and Maeno 2020). Here, the nuclear shell structure leads to a new arrangement of the elements with the proton magic-number nuclei treated like noble-gas atoms. -
The Eclectic Career of Geoffrey Martin
Bull. Hist. Chem., VOLUME 41, Numbers 1/2 (2016) 19 FROM CHEMICAL THEORY TO INDUSTRIAL CHEMISTRY: THE ECLECTIC CAREER OF GEOFFREY MARTIN William B. Jensen, Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221-0172, USA; [email protected] Peter J. T. Morris, The Science Museum, South Kensington, London, SW7 2DD, UK; Peter. [email protected] Geoffrey Martin (Figure 1) was born on 29 January lowing a brief interlude at Leipzig, he finally landed at 1881 in Dover, England, one of several children of Wil- Rostock, where he remained until 1906, having received liam and Grace (née Etheridge) Martin (1). At some point his Ph.D. in chemistry there in December of 1905 (3). the family moved to Wales, where the father, a retired artillery officer who had served in India, began to develop mental problems that necessitated his confinement to the Joint Counties Lunatic Asylum in Carmarthen. The rest of the family then moved to nearby Haverfordwest, where Geoffrey received his secondary education at the local grammar school, followed in 1897 by his enrollment, at age 16, as a student at the Merchant Venturers’ Technical College in Bristol. By 1901 Martin had completed his undergradu- ate work at Bristol, which entitled him to a B.Sc. in chemistry with first class honors from the University of London, since at this time Merchant Venturers was not empowered to grant independent degrees of its own. This was followed by a four-year sojourn in Germany, where he spent the summer of 1902 at the University of Berlin attending the lectures of Warburg, Stark, Fock and Jahn. -
Otto Stern Annalen 22.9.11
September 22, 2011 Otto Stern (1888-1969): The founding father of experimental atomic physics J. Peter Toennies,1 Horst Schmidt-Böcking,2 Bretislav Friedrich,3 Julian C.A. Lower2 1Max-Planck-Institut für Dynamik und Selbstorganisation Bunsenstrasse 10, 37073 Göttingen 2Institut für Kernphysik, Goethe Universität Frankfurt Max-von-Laue-Strasse 1, 60438 Frankfurt 3Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6, 14195 Berlin Keywords History of Science, Atomic Physics, Quantum Physics, Stern- Gerlach experiment, molecular beams, space quantization, magnetic dipole moments of nucleons, diffraction of matter waves, Nobel Prizes, University of Zurich, University of Frankfurt, University of Rostock, University of Hamburg, Carnegie Institute. We review the work and life of Otto Stern who developed the molecular beam technique and with its aid laid the foundations of experimental atomic physics. Among the key results of his research are: the experimental determination of the Maxwell-Boltzmann distribution of molecular velocities (1920), experimental demonstration of space quantization of angular momentum (1922), diffraction of matter waves comprised of atoms and molecules by crystals (1931) and the determination of the magnetic dipole moments of the proton and deuteron (1933). 1 Introduction Short lists of the pioneers of quantum mechanics featured in textbooks and historical accounts alike typically include the names of Max Planck, Albert Einstein, Arnold Sommerfeld, Niels Bohr, Werner Heisenberg, Erwin Schrödinger, Paul Dirac, Max Born, and Wolfgang Pauli on the theory side, and of Konrad Röntgen, Ernest Rutherford, Max von Laue, Arthur Compton, and James Franck on the experimental side. However, the records in the Archive of the Nobel Foundation as well as scientific correspondence, oral-history accounts and scientometric evidence suggest that at least one more name should be added to the list: that of the “experimenting theorist” Otto Stern. -
One Hundred Years of Chemical Warfare: Research
Bretislav Friedrich · Dieter Hoffmann Jürgen Renn · Florian Schmaltz · Martin Wolf Editors One Hundred Years of Chemical Warfare: Research, Deployment, Consequences One Hundred Years of Chemical Warfare: Research, Deployment, Consequences Bretislav Friedrich • Dieter Hoffmann Jürgen Renn • Florian Schmaltz Martin Wolf Editors One Hundred Years of Chemical Warfare: Research, Deployment, Consequences Editors Bretislav Friedrich Florian Schmaltz Fritz Haber Institute of the Max Planck Max Planck Institute for the History of Society Science Berlin Berlin Germany Germany Dieter Hoffmann Martin Wolf Max Planck Institute for the History of Fritz Haber Institute of the Max Planck Science Society Berlin Berlin Germany Germany Jürgen Renn Max Planck Institute for the History of Science Berlin Germany ISBN 978-3-319-51663-9 ISBN 978-3-319-51664-6 (eBook) DOI 10.1007/978-3-319-51664-6 Library of Congress Control Number: 2017941064 © The Editor(s) (if applicable) and The Author(s) 2017. This book is an open access publication. Open Access This book is licensed under the terms of the Creative Commons Attribution-NonCommercial 2.5 International License (http://creativecommons.org/licenses/by-nc/2.5/), which permits any noncom- mercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made. The images or other third party material in this book are included in the book's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the book's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. -
1997) 150–163
Eur. J. Phys. 18 (1997) 150–163. Printed in the UK PII: S0143-0807(97)80684-8 The chemists’ electron Theodore Arabatzis and Kostas Gavroglu Department of History and Philosophy of Science, University of Athens, Greece Received 6 January 1997, in final form 13 February 1997 Abstract. This paper narrates the way chemists have been Resum´ e.´ Dans cet article on narre comment l’electron´ avait using the electron to account for one of the most intriguing et´ e´ utilise´ par les chimistes, afin de rendre compte d’un problems, namely the bonding of two neutral atoms to form a probleme` intriguant, notamment celui de la liaison de deux molecule. The chemists’ attempts to account for the atomes neutres pour former une molecule.´ Les efforts des mechanism of the homopolar bond, first in the context of the chimistes de rendre compte du mecanisme´ de la liaison old quantum theory and after 1926 in the context of wave homopolaire, d’abord dans le contexte de la theorie´ quantique mechanics, brought the specter of reductionism to physics. ancienne, ensuite, apres´ 1926, dans le contexte de la We argue that the chemists’ successful appropriation of the mecanique´ ondulatoire, a fait entrer dans la Physique le electron strengthened, first, the autonomy of physical spectre du reductionnisme.´ Nous soutenons la these` que chemistry and, then, of quantum chemistry with respect to l’appropriation reussie´ de l’electron´ par les chimistes a physics. renforcee´ l’autonomie, par rapport a` la Physique, d’abord de la chimie physique et, ensuite, de la chimie quantique. 1. Introduction which was so appealing to the chemists, obliged the chemists to re-acquisition what they felt was theirs in The aim of Robert Millikan’s Faraday lecture before the first place. -
The Gibbs Paradox: Early History and Solutions
entropy Article The Gibbs Paradox: Early History and Solutions Olivier Darrigol UMR SPHere, CNRS, Université Denis Diderot, 75013 Paris, France; [email protected] Received: 9 April 2018; Accepted: 28 May 2018; Published: 6 June 2018 Abstract: This article is a detailed history of the Gibbs paradox, with philosophical morals. It purports to explain the origins of the paradox, to describe and criticize solutions of the paradox from the early times to the present, to use the history of statistical mechanics as a reservoir of ideas for clarifying foundations and removing prejudices, and to relate the paradox to broad misunderstandings of the nature of physical theory. Keywords: Gibbs paradox; mixing; entropy; irreversibility; thermochemistry 1. Introduction The history of thermodynamics has three famous “paradoxes”: Josiah Willard Gibbs’s mixing paradox of 1876, Josef Loschmidt reversibility paradox of the same year, and Ernst Zermelo’s recurrence paradox of 1896. The second and third revealed contradictions between the law of entropy increase and the properties of the underlying molecular dynamics. They prompted Ludwig Boltzmann to deepen the statistical understanding of thermodynamic irreversibility. The Gibbs paradox—first called a paradox by Pierre Duhem in 1892—denounced a violation of the continuity principle: the mixing entropy of two gases (to be defined in a moment) has the same finite value no matter how small the difference between the two gases, even though common sense requires the mixing entropy to vanish for identical gases (you do not really mix two identical substances). Although this paradox originally belonged to purely macroscopic thermodynamics, Gibbs perceived kinetic-molecular implications and James Clerk Maxwell promptly followed him in this direction. -
James, Steinhauser, Hoffmann, Friedrich One Hundred Years at The
James, Steinhauser, Hoffmann, Friedrich One Hundred Years at the Intersection of Chemistry and Physics Published under the auspices of the Board of Directors of the Fritz Haber Institute of the Max Planck Society: Hans-Joachim Freund Gerard Meijer Matthias Scheffler Robert Schlögl Martin Wolf Jeremiah James · Thomas Steinhauser · Dieter Hoffmann · Bretislav Friedrich One Hundred Years at the Intersection of Chemistry and Physics The Fritz Haber Institute of the Max Planck Society 1911–2011 De Gruyter An electronic version of this book is freely available, thanks to the support of libra- ries working with Knowledge Unlatched. KU is a collaborative initiative designed to make high quality books Open Access. More information about the initiative can be found at www.knowledgeunlatched.org Aut ho rs: Dr. Jeremiah James Prof. Dr. Dieter Hoffmann Fritz Haber Institute of the Max Planck Institute for the Max Planck Society History of Science Faradayweg 4–6 Boltzmannstr. 22 14195 Berlin 14195 Berlin [email protected] [email protected] Dr. Thomas Steinhauser Prof. Dr. Bretislav Friedrich Fritz Haber Institute of the Fritz Haber Institute of the Max Planck Society Max Planck Society Faradayweg 4–6 Faradayweg 4–6 14195 Berlin 14195 Berlin [email protected] [email protected] Cover images: Front cover: Kaiser Wilhelm Institute for Physical Chemistry and Electrochemistry, 1913. From left to right, “factory” building, main building, director’s villa, known today as Haber Villa. Back cover: Campus of the Fritz Haber Institute of the Max Planck Society, 2011. The Institute’s his- toric buildings, contiguous with the “Röntgenbau” on their right, house the Departments of Physical Chemistry and Molecular Physics. -
Història De La Física Quàntica a Través Dels Experiments
Història de la Física Quàntica a través dels experiments semestre de tardor, curs 2017-2018 Apunts provisionals Enric Pérez Canals Apunts en procés de redacció. S’agrairan comentaris, crítiques, suggeriments, etc. Índex 1 La Física de l’electró 1 1.1 Introducció a la Història de la Física Moderna . 1 1.1.1 Algunes precaucions historiogràfiques . 3 1.2 L’experiment de J.J. Thomson . 4 1.2.1 Física del segle XX . 4 1.2.2 Èter i electromagnetisme de Maxwell . 5 1.2.3 Raigs catòdics . 7 1.2.3.1 Cathode Rays, de J.J. Thomson . 7 1.2.4 Descobriments i Positivisme . 10 1.2.4.1 L’experiment de Thomson i l’atomisme . 11 1.2.5 Anàlisi . 11 1.3 L’experiment de Millikan . 12 1.3.1 De corpuscles a electrons ......................... 12 1.3.2 L’atomisme químic . 13 1.3.2.1 Mesures (relatives) de la massa. Pesos atòmics . 13 1.3.2.2 Mesures (relatives) de la càrrega. Electròlisi . 15 1.3.3 Les mesures absolutes . 16 1.3.4 L’experiment de la gota d’oli . 17 1.3.5 Anàlisi . 19 Apèndixs 20 1.A L’aparició de la quantització . 20 1.B L’aïllament de l’electró (i de l’àtom) . 20 1.C Metàfores . 21 Bibliografia . 21 2 Els quanta de llum 25 2.1 La llei de radiació de Planck . 25 2.1.1 Calor radiant: la radiació del Sol . 25 2.1.2 La llei de radiació . 28 2.1.2.1 La llei de Planck i els elements d’energia de Planck, 1900 . -
Fritz Haber at One Hundred Fifty: Evolving Views of and on a German Jewish Patriot*
Fritz Haber at one hundred fifty: Evolving views of and on a German Jewish patriot* Bretislav Friedrich Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195 Berlin Prelude Only few scientists have conferred benefits to humankind – both intellectual and practical – that are on a par with those we owe Fritz Haber. And yet, Haber has been a controversial figure – for about the last third of those one hundred fifty years that elapsed since his birth in 1868. It was Haber’s role in World War One – most notably his initiative to usher in chemical warfare to the battlefield – that cast a long shadow over his legacy. The moral outrage elicited by the German chlorine cloud attack at Ypres on 22 April 1915 was immediate, but not long lasting: Within a few months of Ypres, the Entente deployed its own potent chemical arsenal and eventually declared, alongside with Germany, poison gas a “humane weapon” [Friedrich et al. 2017]. In the 1920s and early 1930s, Haber could even act, together with Albert Einstein and others, as ambassador of German science in Europe and America and actively participate in repairing the damage done to international cooperation by the “war of the intellects” [Wolff 2001, Wolff 2003, Berg und Thiel 2018] in general and the “chemists’ war” [Friedrich 2015] in particular. * An abridged version of this article was presented as a keynote address at “Fritz Haber im Fokus. Eine kritische Würdigung des umstrittenen Chemikers” held at the Centre for General and Cultural Studies, Karlsruhe Institute of Technology, on 15 January 2019, cf. -
Putting the Quantum to Work: Otto Sackur's Pioneering Exploits in The
Putting the quantum to work: Otto Sackur’s pioneering exploits in the quantum theory of gases Massimiliano Badino and Bretislav Friedrich FHI Abstract: In the wake of the First Solvay Conference (1911), many leading physicists had begun embracing the quantum hypothesis as a key to solving outstanding problems in the theory of matter. The quantum approach proved successful in tackling the solid state, resulting in the nearly definitive theories of Debye (1912) and of Born & von Karman (1912-13). However, the application of the old quantum theory to gases was hindered by serious difficulties, which were due to a lack of a straightforward way of reconciling the frequency-dependent quantum hypothesis with the aperiodic behavior of gas molecules. A breakthrough came from unlikely quarters. Otto Sackur (1880-1914) had been trained as a physical chemist and had almost no experience in the research fields traditionally associated with quantum theory (heat radiation, statistical mechanics, thermodynamics). However, in 1911, he discovered an expression for the absolute entropy of a monoatomic gas. A Dutch high-school student, Hugo Martin Tetrode, reached the same result at about the same time independently. The Sackur-Tetrode equation rendered entropy as an extensive variable (in contrast to the classical expression, cf. the Gibbs paradox) and expressed the thermodynamically undetermined constant in terms of molecular parameters and Boltzmann’s and Planck’s constants. This result was of great heuristic value because it suggested the possibility of deriving the thermodynamic variables of a gas quantum mechanically. At the same time, the Sackur-Tetrode equation offered a conventient means to evaluate the parameters of molecular gases, thus promising a grand unification of quantum theory, thermodynamics, and physical chemistry.