Periodic Table and Atomic Weights
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Evolution and Understanding of the D-Block Elements in the Periodic Table Cite This: Dalton Trans., 2019, 48, 9408 Edwin C
Dalton Transactions View Article Online PERSPECTIVE View Journal | View Issue Evolution and understanding of the d-block elements in the periodic table Cite this: Dalton Trans., 2019, 48, 9408 Edwin C. Constable Received 20th February 2019, The d-block elements have played an essential role in the development of our present understanding of Accepted 6th March 2019 chemistry and in the evolution of the periodic table. On the occasion of the sesquicentenniel of the dis- DOI: 10.1039/c9dt00765b covery of the periodic table by Mendeleev, it is appropriate to look at how these metals have influenced rsc.li/dalton our understanding of periodicity and the relationships between elements. Introduction and periodic tables concerning objects as diverse as fruit, veg- etables, beer, cartoon characters, and superheroes abound in In the year 2019 we celebrate the sesquicentennial of the publi- our connected world.7 Creative Commons Attribution-NonCommercial 3.0 Unported Licence. cation of the first modern form of the periodic table by In the commonly encountered medium or long forms of Mendeleev (alternatively transliterated as Mendelejew, the periodic table, the central portion is occupied by the Mendelejeff, Mendeléeff, and Mendeléyev from the Cyrillic d-block elements, commonly known as the transition elements ).1 The periodic table lies at the core of our under- or transition metals. These elements have played a critical rôle standing of the properties of, and the relationships between, in our understanding of modern chemistry and have proved to the 118 elements currently known (Fig. 1).2 A chemist can look be the touchstones for many theories of valence and bonding. -
The Periodic Table of Elements
The Periodic Table of Elements 1 2 Atomic Number = Number of Protons = Number of Electrons H 6 He HYDROGEN HELIUM 1 Chemical Symbol NON-METALS 4 3 4 C 5 6 7 8 9 10 Li Be CARBON Chemical Name B C N O F Ne LITHIUM BERYLLIUM Atomic Weight = Number of Protons + Number of Neutrons* BORON CARBON NITROGEN OXYGEN FLUORINE NEON 7 9 12 11 12 14 16 19 20 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar SODIUM MAGNESIUM ALUMINUM SILICON PHOSPHORUS SULFUR CHLORINE ARGON 23 24 METALS 27 28 31 32 35 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr POTASSIUM CALCIUM SCANDIUM TITANIUM VANADIUM CHROMIUM MANGANESE IRON COBALT NICKEL COPPER ZINC GALLIUM GERMANIUM ARSENIC SELENIUM BROMINE KRYPTON 39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe RUBIDIUM STRONTIUM YTTRIUM ZIRCONIUM NIOBIUM MOLYBDENUM TECHNETIUM RUTHENIUM RHODIUM PALLADIUM SILVER CADMIUM INDIUM TIN ANTIMONY TELLURIUM IODINE XENON 85 88 89 91 93 96 98 101 103 106 108 112 115 119 122 128 127 131 55 56 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn CESIUM BARIUM HAFNIUM TANTALUM TUNGSTEN RHENIUM OSMIUM IRIDIUM PLATINUM GOLD MERCURY THALLIUM LEAD BISMUTH POLONIUM ASTATINE RADON 133 137 178 181 184 186 190 192 195 197 201 204 207 209 209 210 222 87 88 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Uub Uut Uuq Uup Uuh Uus Uuo FRANCIUM RADIUM -
Historical Development of the Periodic Classification of the Chemical Elements
THE HISTORICAL DEVELOPMENT OF THE PERIODIC CLASSIFICATION OF THE CHEMICAL ELEMENTS by RONALD LEE FFISTER B. S., Kansas State University, 1962 A MASTER'S REPORT submitted in partial fulfillment of the requirements for the degree FASTER OF SCIENCE Department of Physical Science KANSAS STATE UNIVERSITY Manhattan, Kansas 196A Approved by: Major PrafeLoor ii |c/ TABLE OF CONTENTS t<y THE PROBLEM AND DEFINITION 0? TEH-IS USED 1 The Problem 1 Statement of the Problem 1 Importance of the Study 1 Definition of Terms Used 2 Atomic Number 2 Atomic Weight 2 Element 2 Periodic Classification 2 Periodic Lav • • 3 BRIEF RtiVJiM OF THE LITERATURE 3 Books .3 Other References. .A BACKGROUND HISTORY A Purpose A Early Attempts at Classification A Early "Elements" A Attempts by Aristotle 6 Other Attempts 7 DOBEREBIER'S TRIADS AND SUBSEQUENT INVESTIGATIONS. 8 The Triad Theory of Dobereiner 10 Investigations by Others. ... .10 Dumas 10 Pettehkofer 10 Odling 11 iii TEE TELLURIC EELIX OF DE CHANCOURTOIS H Development of the Telluric Helix 11 Acceptance of the Helix 12 NEWLANDS' LAW OF THE OCTAVES 12 Newlands' Chemical Background 12 The Law of the Octaves. .........' 13 Acceptance and Significance of Newlands' Work 15 THE CONTRIBUTIONS OF LOTHAR MEYER ' 16 Chemical Background of Meyer 16 Lothar Meyer's Arrangement of the Elements. 17 THE WORK OF MENDELEEV AND ITS CONSEQUENCES 19 Mendeleev's Scientific Background .19 Development of the Periodic Law . .19 Significance of Mendeleev's Table 21 Atomic Weight Corrections. 21 Prediction of Hew Elements . .22 Influence -
The Development of the Periodic Table and Its Consequences Citation: J
Firenze University Press www.fupress.com/substantia The Development of the Periodic Table and its Consequences Citation: J. Emsley (2019) The Devel- opment of the Periodic Table and its Consequences. Substantia 3(2) Suppl. 5: 15-27. doi: 10.13128/Substantia-297 John Emsley Copyright: © 2019 J. Emsley. This is Alameda Lodge, 23a Alameda Road, Ampthill, MK45 2LA, UK an open access, peer-reviewed article E-mail: [email protected] published by Firenze University Press (http://www.fupress.com/substantia) and distributed under the terms of the Abstract. Chemistry is fortunate among the sciences in having an icon that is instant- Creative Commons Attribution License, ly recognisable around the world: the periodic table. The United Nations has deemed which permits unrestricted use, distri- 2019 to be the International Year of the Periodic Table, in commemoration of the 150th bution, and reproduction in any medi- anniversary of the first paper in which it appeared. That had been written by a Russian um, provided the original author and chemist, Dmitri Mendeleev, and was published in May 1869. Since then, there have source are credited. been many versions of the table, but one format has come to be the most widely used Data Availability Statement: All rel- and is to be seen everywhere. The route to this preferred form of the table makes an evant data are within the paper and its interesting story. Supporting Information files. Keywords. Periodic table, Mendeleev, Newlands, Deming, Seaborg. Competing Interests: The Author(s) declare(s) no conflict of interest. INTRODUCTION There are hundreds of periodic tables but the one that is widely repro- duced has the approval of the International Union of Pure and Applied Chemistry (IUPAC) and is shown in Fig.1. -
FRANCIUM Element Symbol: Fr Atomic Number: 87
FRANCIUM Element Symbol: Fr Atomic Number: 87 An initiative of IYC 2011 brought to you by the RACI KAYE GREEN www.raci.org.au FRANCIUM Element symbol: Fr Atomic number: 87 Francium (previously known as eka-cesium and actinium K) is a radioactive metal and the second rarest naturally occurring element after Astatine. It is the least stable of the first 103 elements. Very little is known of the physical and chemical properties of Francium compared to other elements. Francium was discovered by Marguerite Perey of the Curie Institute in Paris, France in 1939. However, the existence of an element of atomic number 87 was predicted in the 1870s by Dmitri Mendeleev, creator of the first version of the periodic table, who presumed it would have chemical and physical properties similar to Cesium. Several research teams attempted to isolate this missing element, and there were at least four false claims of discovery during which it was named Russium (after the home country of soviet chemist D. K. Dobroserdov), Alkalinium (by English chemists Gerald J. K. Druce and Frederick H. Loring as the heaviest alkali metal), Virginium (after Virginia, home state of chemist Fred Allison), and Moldavium (by Horia Hulubei and Yvette Cauchois after Moldavia, the Romanian province where they conducted their work). Perey finally discovered Francium after purifying radioactive Actinium-227 from Lanthanum, and detecting particles decaying at low energy levels not previously identified. The new product exhibited chemical properties of an alkali metal (such as co-precipitating with Cesium salts), which led Perey to believe that it was element 87, caused by the alpha radioactive decay of Actinium-227. -
The Separation of Bismuth-213 from Actinium-225 and the Ion Exchange Properties of the Alkali Metal Cations with an Inorganic Resin
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 12-2017 The Separation of Bismuth-213 from Actinium-225 and the Ion Exchange Properties of the Alkali Metal Cations with an Inorganic Resin Mark Alan Moore University of Tennessee Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Recommended Citation Moore, Mark Alan, "The Separation of Bismuth-213 from Actinium-225 and the Ion Exchange Properties of the Alkali Metal Cations with an Inorganic Resin. " PhD diss., University of Tennessee, 2017. https://trace.tennessee.edu/utk_graddiss/4848 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Mark Alan Moore entitled "The Separation of Bismuth-213 from Actinium-225 and the Ion Exchange Properties of the Alkali Metal Cations with an Inorganic Resin." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Chemical Engineering. Robert Counce, Major Professor We have read this dissertation and recommend its acceptance: Paul Dalhaimer, Howard Hall, George Schweitzer, Jack Watson Accepted for the Council: Dixie L. Thompson Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) The Separation of Bismuth-213 from Actinium-225 and the Ion Exchange Properties of the Alkali Metal Cations with an Inorganic Resin A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Mark Alan Moore December 2017 Copyright © 2017 by Mark A. -
The Periodic Table of Elements
The Periodic Table of Elements 1 2 6 Atomic Number = Number of Protons = Number of Electrons HYDROGENH HELIUMHe 1 Chemical Symbol NON-METALS 4 3 4 C 5 6 7 8 9 10 Li Be CARBON Chemical Name B C N O F Ne LITHIUM BERYLLIUM = Number of Protons + Number of Neutrons* BORON CARBON NITROGEN OXYGEN FLUORINE NEON 7 9 12 Atomic Weight 11 12 14 16 19 20 11 12 13 14 15 16 17 18 SODIUMNa MAGNESIUMMg ALUMINUMAl SILICONSi PHOSPHORUSP SULFURS CHLORINECl ARGONAr 23 24 METALS 27 28 31 32 35 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 POTASSIUMK CALCIUMCa SCANDIUMSc TITANIUMTi VANADIUMV CHROMIUMCr MANGANESEMn FeIRON COBALTCo NICKELNi CuCOPPER ZnZINC GALLIUMGa GERMANIUMGe ARSENICAs SELENIUMSe BROMINEBr KRYPTONKr 39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 RUBIDIUMRb STRONTIUMSr YTTRIUMY ZIRCONIUMZr NIOBIUMNb MOLYBDENUMMo TECHNETIUMTc RUTHENIUMRu RHODIUMRh PALLADIUMPd AgSILVER CADMIUMCd INDIUMIn SnTIN ANTIMONYSb TELLURIUMTe IODINEI XeXENON 85 88 89 91 93 96 98 101 103 106 108 112 115 119 122 128 127 131 55 56 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 CESIUMCs BARIUMBa HAFNIUMHf TANTALUMTa TUNGSTENW RHENIUMRe OSMIUMOs IRIDIUMIr PLATINUMPt AuGOLD MERCURYHg THALLIUMTl PbLEAD BISMUTHBi POLONIUMPo ASTATINEAt RnRADON 133 137 178 181 184 186 190 192 195 197 201 204 207 209 209 210 222 87 88 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 FRANCIUMFr RADIUMRa RUTHERFORDIUMRf DUBNIUMDb SEABORGIUMSg BOHRIUMBh HASSIUMHs MEITNERIUMMt DARMSTADTIUMDs ROENTGENIUMRg COPERNICIUMCn NIHONIUMNh -
An Octad for Darmstadtium and Excitement for Copernicium
SYNOPSIS An Octad for Darmstadtium and Excitement for Copernicium The discovery that copernicium can decay into a new isotope of darmstadtium and the observation of a previously unseen excited state of copernicium provide clues to the location of the “island of stability.” By Katherine Wright holy grail of nuclear physics is to understand the stability uncover its position. of the periodic table’s heaviest elements. The problem Ais, these elements only exist in the lab and are hard to The team made their discoveries while studying the decay of make. In an experiment at the GSI Helmholtz Center for Heavy isotopes of flerovium, which they created by hitting a plutonium Ion Research in Germany, researchers have now observed a target with calcium ions. In their experiments, flerovium-288 previously unseen isotope of the heavy element darmstadtium (Z = 114, N = 174) decayed first into copernicium-284 and measured the decay of an excited state of an isotope of (Z = 112, N = 172) and then into darmstadtium-280 (Z = 110, another heavy element, copernicium [1]. The results could N = 170), a previously unseen isotope. They also measured an provide “anchor points” for theories that predict the stability of excited state of copernicium-282, another isotope of these heavy elements, says Anton Såmark-Roth, of Lund copernicium. Copernicium-282 is interesting because it University in Sweden, who helped conduct the experiments. contains an even number of protons and neutrons, and researchers had not previously measured an excited state of a A nuclide’s stability depends on how many protons (Z) and superheavy even-even nucleus, Såmark-Roth says. -
High-Temperature Structural Evolution of Caesium and Rubidium Triiodoplumbates D.M
High-temperature structural evolution of caesium and rubidium triiodoplumbates D.M. Trots, S.V. Myagkota To cite this version: D.M. Trots, S.V. Myagkota. High-temperature structural evolution of caesium and rubidium tri- iodoplumbates. Journal of Physics and Chemistry of Solids, Elsevier, 2009, 69 (10), pp.2520. 10.1016/j.jpcs.2008.05.007. hal-00565442 HAL Id: hal-00565442 https://hal.archives-ouvertes.fr/hal-00565442 Submitted on 13 Feb 2011 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Author’s Accepted Manuscript High-temperature structural evolution of caesium and rubidium triiodoplumbates D.M. Trots, S.V. Myagkota PII: S0022-3697(08)00173-X DOI: doi:10.1016/j.jpcs.2008.05.007 Reference: PCS 5491 To appear in: Journal of Physics and www.elsevier.com/locate/jpcs Chemistry of Solids Received date: 31 January 2008 Revised date: 2 April 2008 Accepted date: 14 May 2008 Cite this article as: D.M. Trots and S.V. Myagkota, High-temperature structural evolution of caesium and rubidium triiodoplumbates, Journal of Physics and Chemistry of Solids, doi:10.1016/j.jpcs.2008.05.007 This is a PDF file of an unedited manuscript that has been accepted for publication. -
Improvement in Retention of Solid Fission Products in HTGR Fuel Particles by Ceramic Kernel Additives
FORMAL REPORT GERHTR-159 UNITED STATES-GERMAN HIGH TEMPERATURE REACTOR RESEARCH EXCHANGE PROGRAM Original report number ______________________ Title Improvement in Retention of Solid Fission Products in HTGR Fuel Particles by Ceramic Kernel Additives Authorial R. Forthmann, E. Groos and H. Grobmeier Originating Installation Kemforschtmgsanlage Juelich, West Germany. Date of original report issuance August 1975_______ Reporting period covered _ _____________________________ In the original English This report, translated wholly or in part from the original language, has been reproduced directly from copy pre pared by the United States Mission to the European Atomic Energy Community THIS REPORT MAY BE GIVEN UNLIMITED DISTRIBUTION ERDA Technical Information Center, Oak Ridge, Tennessee DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. GERHTR-159 Distribution Category UC-77 CONTENTS page 1. INTRODUCTION 2 2. FUNDAMENTAL STUDIES 3 3. IRRADIATION EXPERIMENT FRJ2-P17 5 3.1 Results of the Fission Product 8 Release Measurements Improvement in Retention of Solid 3.2 Electron Microprobe Investigations Fission Products in HTGR Fuel Particles 8 by Ceramic Kernel Additives. 4. IRRADIATION EXPERIMENT FRJ2-P18 16 4.1 Release of Solid Fission Products 19 4.2 Electron Microprobe Studies 24 by R. Forthmann, E. Groos, H. GrObmeier 5. SUMMARY AND CONCLUSIONS 27 6. ACKNOWLEDGEMENT 28 7. REFERENCES 29 2 - X. INTRODUCTION Kernforschungs- anlage JUTich JOL - 1226 August 1975 Considerations of the core design of advanced High-Temperature Gas-cooled GmbH IRW Reactors (HTGRs) led to increased demands concerning solid fission product retention in the fuel elements. This would be desirable not only for HTGR power plants with a helium-turbine in the primary circuit (HHT project), but also for the application of HTGRs as a source of nuclear process heat. -
Darmstadtium, Roentgenium and Copernicium Form Strong Bonds with Cyanide
Darmstadtium, Roentgenium and Copernicium Form Strong Bonds With Cyanide Taye B. Demissie∗and Kenneth Ruudy March 23, 2017 Abstract We report the structures and properties of the cyanide complexes of three super- heavy elements (darmstadtium, roentgenium and copernicium) studied using two- and four-component relativistic methodologies. The electronic and structural properties of these complexes are compared to the corresponding complexes of platinum, gold and mercury. The results indicate that these superheavy elements form strong bonds with cyanide. Moreover, the calculated absorption spectra of these superheavy-element cyanides show similar trends to those of the corresponding heavy-atom cyanides. The calculated vibrational frequencies of the heavy-metal cyanides are in good agreement with available experimental results lending support to the quality of our calculated vibrational frequencies for the superheavy-atom cyanides. ∗Centre for Theoretical and Computational Chemistry, Department of Chemistry, UiT The Arctic Uni- versity of Norway, N-9037 Tromsø, Norway yCentre for Theoretical and Computational Chemistry, Department of Chemistry, UiT The Arctic Uni- versity of Norway, N-9037 Tromsø, Norway 1 Relativistic two- and four-component density-functional theory is used to demonstrate that the superheavy elements darmstadtium, roentgenium and copernicium form stable complexes with cyanide, providing new insight into the chemistry of these superheavy elements. 2 INTRODUCTION The term heavy atom refers roughly to elements in the 4th - -
Density Functional Theory Metadynamics of Silver, Caesium and Palladium Diffusion at B-Sic Grain Boundaries ⇑ Jeremy Rabone A, , Eddie López-Honorato B
Journal of Nuclear Materials 458 (2015) 56–63 Contents lists available at ScienceDirect Journal of Nuclear Materials journal homepage: www.elsevier.com/locate/jnucmat Density functional theory metadynamics of silver, caesium and palladium diffusion at b-SiC grain boundaries ⇑ Jeremy Rabone a, , Eddie López-Honorato b a European Commission, Joint Research Centre, Institute for Transuranium Elements, D-76125 Karlsruhe, Germany b Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Unidad Saltillo, Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe 25900, Coahuila, Mexico highlights DFT metadynamics of diffusion of Pd, Ag and Cs on grain boundaries in b-SiC. The calculated diffusion rates for Pd and Ag tally with experimental release rates. A mechanism of release other than grain boundary diffusion seems likely for Cs. article info abstract Article history: The use of silicon carbide in coated nuclear fuel particles relies on this materials impermeability towards Received 22 May 2014 fission products under normal operating conditions. Determining the underlying factors that control the Accepted 9 November 2014 rate at which radionuclides such as Silver-110m and Caesium-137 can cross the silicon carbide barrier Available online 4 December 2014 layers, and at which fission products such as palladium could compromise or otherwise alter the nature of this layer, are of paramount importance for the safety of this fuel. To this end, DFT-based metadynam- ics simulations are applied to the atomic diffusion of silver, caesium and palladium along a R5 grain boundary and to palladium along a carbon-rich R3 grain boundary in cubic silicon carbide at 1500 K. For silver, the calculated diffusion coefficients lie in a similar range (7.04 Â 10À19–3.69 Â 10À17 m2 sÀ1) as determined experimentally.