Chemistry Nexus

by WebElements: the periodic table on the web

Press release from RIKEN Nishina Center for Accelerator-Based Science

The most unambiguous data to date on the elusive 113th atomic element has been obtained by researchers at the RIKEN Nishina Center for Accelerator-based Science (RNC). A chain of six consecutive alpha decays, produced in experiments at the RIKEN Radioisotope Beam Factory (RIBF), conclusively identifies the element through connections to well-known daughter nuclides.

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September 27th, 2012

Posted In: Chemistry, Group 13 elements, Nuclear chemistry, Radioactive elements

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The International Union of Pure and Applied Chemistry (IUPAC) has recommended names for elements 114 and 116. Scientists from the Lawrence Livermore National Laboratory (LLNL) and at Dubna proposed the names as Flerovium for element 114 and Livermorium for element 116.

21371_periodicTable650

Flerovium (atomic symbol Fl) was chosen to honor Flerov Laboratory of Nuclear Reactions, where superheavy elements, including element 114, were synthesized.

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December 2nd, 2011

Posted In: Chemistry

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Attached find a printable (pdf) QR-coded periodic table with links to online periodic table data. QR codes are 2-dimensional bar codes readable by, for instance, some apps on iPhones and others.

periodic-table-qr.preview

Print the attached pdf on a big a piece of paper as possible, otherwise your QR reader may pick up an element you didn’t intend.

Version history – 1.1: 15 September 2011; 1.0: 17 July 2011

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September 15th, 2011

Posted In: Chemistry

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A news reports from IUPAC confirms the discoveries of elements 114 and 116. Proposals for the names of the two elements will follow in due course.

Discovery of Elements with Atomic Number 114 and 116

Priority for the discovery of the elements with atomic number 114 and 116 has been assigned, in accordance with the agreed criteria, to collaborative work between scientists from the Joint Institute for Nuclear Research in Dubna, Russia and from Lawrence Livermore, California, USA (the Dubna-Livermore collaborations).

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June 5th, 2011

Posted In: Chemistry, Group 14 elements, Group 16 elements, Nuclear chemistry, p-Block, Radioactive elements

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The BBC is airing some “periodic tales” on Radio 4. Familiar Radio 4 voices introduce elements from the Periodic Table and the unique roles they play in human existence – with a little help from the irreverent Tom Lehrer. Listen to these ten elements:

  • Krypton: Heidli Nicklaus on the Superman element, krypton
  • Helium: Brian Perkins dramatises the effects of Helium
  • Silver: Trevor Harrison (Eddie Grundy in the Archers) finds some unusual properties of Silver
  • Cobalt: Hedli Nicklaus (Cathy Perks) takes on the goblin element of cobalt
  • Selenium: Carole Boyd (The Archers’ Linda Snell) unearths selenium
  • Oxygen: Brian Perkins bravely dramatises the effects of oxygen
  • Arsenic: Charlotte Green takes on the deadly history of arsenic
  • Mercury: Carole Boyd (Linda Snell) reflects on mercury, the poisonous liquid metal
  • Iodine: Charlotte Green on the discovery of iodine’s essential place in brain development
  • Nickel: Trevor Harrison reveals that the space station Mir is largely made of nickel

[Note added Dec 2009: sadly these recordings no longer exist on the BBC site.

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February 7th, 2011

Posted In: Chemistry

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Royal Society Digital Journal Archive Free from 23 Nov to 28 Feb 2010.

The year “2010 is going to be a very special year at the Royal Society. As the worlds oldest science academy, we are looking forward to celebrating our 350th anniversary and to mark this special occasion we are making our digital archive containing more than 65,000 articles free to access.

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November 23rd, 2010

Posted In: Chemistry, History of chemistry

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International team discovers element 117

A new chemical element has been added to the Periodic Table: A paper on the discovery of element 117 has been accepted for publication (5 April 2010) in Physical Review Letters.1

Abstract

The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes 293117 and 294117 were produced in fusion reactions between 48Ca and 249Bk.

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April 12th, 2010

Posted In: Chemistry, Group 17 elements, Nuclear chemistry, p-Block, Radioactive elements

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117Notes from the 31st meeting of PAC for Nuclear Physics seems to suggest that a claim for element 117 (at the base of the halogen column) may come in the coming weeks and months. It’s not very clear which isotopes may have been formed so watch this space.

IV. Experiments on the synthesis of element 117

The PAC heard with great interest the report on the results of the experiment dedicated to the synthesis of element 117 in the 48Ca + 249Bk reaction.

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March 10th, 2010

Posted In: Group 17 elements, p-Block, Radioactive elements

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IUPAC has officially approved the name copernicium, with symbol Cn, for the element of atomic number 112.1 Priority for the discovery of this element was assigned, in accordance with the agreed criteria, to the Gesellschaft für Schwerionenforschung (GSI) (Center for Heavy Ion Research) in Darmstadt, Germany. The team at GSI proposed the name copernicium which has now been approved by IUPAC.

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February 21st, 2010

Posted In: d-Block, Group 12 elements, Nuclear chemistry, Radioactive elements

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The low-lying electronic states of Rf+ and Rf are investigated by the relativistic coupled cluster method based on the Dirac-Coulomb-Breit Hamiltonian. A large basis set (34s24p19d13f8g5h4i) of Gaussian-type orbitals is used. The external 36 electrons are correlated. In contrast with recent multiconfiguration Dirac-Fock (MCDF) results, the 7s26d2 3F2 state is found to be the ground state of the atom, lying about 0.30 eV below the 7s27p6d 3D2 state (the MCDF ground state).

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December 24th, 2009

Posted In: Chemistry

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