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Encyclopedia > Roentgenium
111 darmstadtiumroentgeniumununbium
Au

Rg

(Uhu)
General
Name, Symbol, Number roentgenium, Rg, 111
Chemical series transition metals
Group, Period, Block 11, 7, d
Appearance unknown, probably yellow or
orange metallic
Atomic mass (284) g/mol
Electron configuration perhaps [Rn] 5f14 6d10 7s1
(guess based on gold)
Electrons per shell 2, 8, 18, 32, 32, 18, 1
Phase presumably a solid
CAS registry number 54386-24-2
References

Roentgenium (IPA: /ˌr(ə/o)ʊntˈgɛniəm/, formerly Unununium) is a chemical element in the periodic table that has the symbol Rg and atomic number 111 making it one of the super-heavy atoms. It is a synthetic element whose longest-lived isotope has a mass of 280 and a half-life of 3.6 seconds. Due to its presence in Group 11 it is a transition metal and so probably would appear as a heavy, solid, shiny metal. Due to the inert pair effect, it should be colored like gold. [citation needed] General Name, Symbol, Number darmstadtium, Ds, 110 Chemical series transition metals Group, Period, Block 10, 7, d Appearance unknown, probably silvery white or metallic gray Atomic mass (281) g/mol Electron configuration perhaps [Rn] 5f14 6d9 7s1 (guess based on platinum) Electrons per shell 2, 8, 18, 32, 32, 17... General Name, Symbol, Number ununbium, Uub, 112 Chemical series transition metals Group, Period, Block 12, 7, d Appearance unknown, probably silvery white or metallic gray liquid Atomic mass (285) g/mol Electron configuration perhaps [Rn] 5f14 6d10 7s2 (guess based on mercury) Electrons per shell 2, 8, 18, 32, 32... General Name, Symbol, Number gold, Au, 79 Chemical series transition metals Group, Period, Block 11, 6, d Appearance metallic yellow Atomic mass 196. ... Image File history File links Download high resolution version (890x260, 22 KB) Description: Properties for roentgenium Source: Image:Rg-TableImage-BIG.png License: GFDL File links The following pages link to this file: Roentgenium User:Femto/elements e10 ... This is a standard display of the periodic table of elements. ... This extended periodic table was suggested by Glenn T. Seaborg in 1969. ... This is a list of chemical elements, sorted by name and color coded according to type of element. ... Categories: Chemical elements ... sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex sex... In chemistry, the term transition metal (sometimes also called a transition element) has two possible meanings: It commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and mercury. ... A periodic table group is a vertical column in the periodic table of the chemical elements. ... In the periodic table of the elements, a period is a row of the table. ... A block of the periodic table of elements is a set of adjacent groups. ... A Group 11 element is the series of elements in group 11 (IUPAC style) in the periodic table, consisting of transition metals which are the traditional coinage metals of copper (Cu), silver (Ag), and gold (Au). ... A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the elements. ... D Block is a rap group based in Yonkers, New York. ... Color is an important part of the visual arts. ... The atomic mass of a chemical element is the mass of an atom at rest, most often expressed in unified atomic mass units. ... To help compare different orders of magnitude we list here masses between 60. ... Electron atomic and molecular orbitals In atomic physics and quantum chemistry, the electron configuration is the arrangement of electrons in an atom, molecule, or other physical structure (eg, a crystal). ... General Name, Symbol, Number radon, Rn, 86 Chemical series noble gases Group, Period, Block 18, 6, p Appearance colorless Atomic mass (222) g/mol Electron configuration [Xe] 4f14 5d10 6s2 6p6 Electrons per shell 2, 8, 18, 32, 18, 8 Physical properties Phase gas Density (0 °C, 101. ... General Name, Symbol, Number gold, Au, 79 Chemical series transition metals Group, Period, Block 11, 6, d Appearance metallic yellow Atomic mass 196. ... The electron is a fundamental subatomic particle that carries an electric charge. ... Example of a sodium electron shell model An electron shell, also known as a main energy level, is a group of atomic orbitals with the same value of the principal quantum number n. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... In jewelry, a solid gold piece is the alternative to gold-filled or gold-plated jewelry. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Recommended values for many properties of the elements, together with various references, are collected on these data pages. ... For information on how to read IPA transcriptions of English words see here. ... The periodic table of the chemical elements (this version outdated on October 13, 2006) A chemical element, often called simply an element, is a substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical processes. ... The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev. ... In chemistry and physics, the atomic number (Z) is the number of protons found in the nucleus of an atom. ... In chemistry, transuranium elements (also known as transuranic elements) are the chemical elements with atomic numbers greater than 92, the atomic number of uranium. ... The chemical elements labelled as synthetic are unstable, with a half-life so short (ranging from a fraction of millisecond to a few million years) relative to the age of the Earth that any atoms of that element that may have been present when the Earth formed have long since... Isotopes are any of the several different forms of an element each having different atomic mass. ... Half-Life For a quantity subject to exponential decay, the half-life is the time required for the quantity to fall to half of its initial value. ... This article is about the unit of time. ... In chemistry, the term transition metal (sometimes also called a transition element) has two possible meanings: It commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and mercury. ... In physics and chemistry, the inert pair effect occurs when electrons are pulled closer to the nucleus, making them stabler and more difficult to ionise. ... General Name, Symbol, Number gold, Au, 79 Chemical series transition metals Group, Period, Block 11, 6, d Appearance metallic yellow Atomic mass 196. ...

Contents

History

It was first created at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany on December 8, 1994. Only three atoms of it were observed (all 272Rg), by the fusion of bismuth-209 and nickel-64 in a linear accelerator. (Nickel was bombarded onto the bismuth target.) This article or section should be merged with Timeline of chemical element discovery The story of the discoveries of the chemical elements is presented here in chronological order. ... The Gesellschaft für Schwerionenforschung mbH (GSI, Institute for Heavy Ion Research) in Wixhausen, a suburb of Darmstadt, Germany is a federally funded heavy ion research center. ... Darmstadt is a city in the Bundesland (federal state) of Hessen in Germany. ... December 8 is the 342nd day (343rd in leap years) of the year in the Gregorian calendar. ... 1994 (MCMXCIV) was a common year starting on Saturday of the Gregorian calendar, and was designated as the International Year of the Family and the International Year of the Sport and the Olympic Ideal by United Nations. ... Atomic redirects here. ... General Name, Symbol, Number bismuth, Bi, 83 Chemical series poor metals Group, Period, Block 15, 6, p Appearance lustrous reddish white Atomic mass 208. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic and silvery with a gold tinge Atomic mass 58. ... A Linear particle accelerator is an electrical device for the acceleration of subatomic particles. ...


The name roentgenium was accepted as a permanent name on November 1, 2004 in honor of Wilhelm Röntgen; before this date, the element was known under the temporary IUPAC systematic element name unununium (IPA: /ˌuːˌnuːˈnuːniəm/, symbol Uuu). Some research has referred to it as eka-gold. November 1 is the 305th day of the year (306th in leap years) in the Gregorian Calendar, with 60 days remaining. ... 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... Wilhelm Röntgen Wilhelm Conrad Röntgen (March 27, 1845 – February 10, 1923) was a German physicist, of the University of Würzburg, who, on November 8, 1895, produced wavelengths of electromagnetic radiation that are now known as x-rays or Röntgen Rays. ... The International Union of Pure and Applied Chemistry (IUPAC) is an international non-governmental organization devoted to the advancement of chemistry. ... In chemistry, heavy transuranic elements receive a permanent trivial name and symbol only after their synthesis has been confirmed. ... For information on how to read IPA transcriptions of English words see here. ... Professor Dimitri Mendeleev published the first Periodic Table of the Atomic Elements in 1869 based on properties which appeared with some regularity as he laid out the elements from lightest to heaviest. ... General Name, Symbol, Number gold, Au, 79 Chemical series transition metals Group, Period, Block 11, 6, d Appearance metallic yellow Atomic mass 196. ...


The official baptism took place at GSI, on Friday November 17, 2006, in presence of Annette Schavan, the Federal German Minister of Research. 17 November is also the name of a Marxist group in Greece, coinciding with the anniversary of the Athens Polytechnic uprising. ... 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... Annette Schavan (born June 10, 1955 in Jüchen) is a German politician (CDU). ...


Isotopes

Three isotopes of roentgenium are known. The longest-lived of these is 280Rg which decays through alpha decay and has a half-life of 3.6 s. The shortest-lived isotope is 272Rg which decays through alpha decay and has a half life of 1.5 ms. The other known isotope, 279Rg, decays through alpha decay and has a half-life of 170 ms. Isotopes are any of the several different forms of an element each having different atomic mass. ... Alpha decay is a form of radioactive decay in which an atomic nucleus ejects an alpha particle through electromagnetic force and transforms into a nucleus with mass number 4 less and atomic number 2 less. ... Half-Life For a quantity subject to exponential decay, the half-life is the time required for the quantity to fall to half of its initial value. ... This article is about the unit of time. ... A millisecond is an SI-derived unit of time, equal to one thousandth of a second. ...


Trivia

The elements in Group 11 used to informally be called the coinage metals, due to their historical use in coins. It is unlikely that roentgenium can be used to make coins since all of its isotopes are radioactive with very short half-lives - and if it could, it would be the world's first currency with an inbuilt deflation mechanism (if the reader will pardon the indulgence in wit). A Group 11 element is the series of elements in group 11 (IUPAC style) in the periodic table, consisting of transition metals which are the traditional coinage metals of copper (Cu), silver (Ag), and gold (Au). ... Deflation (economics) Deflation (data compression) Deflation is the removal of loose soil by eolian (wind) processes This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...


External links

Wikimedia Commons has media related to:
Roentgenium
  • WebElements.com - Roentgenium
  • IUPAC: Proposal of name roentgenium for element 111
  • IUPAC: Element 111 is named roentgenium
  • Apsidium - Roentgenium Element 111
  • - Unununium Element At Chemicalelements.com

  Results from FactBites:
 
Roentgenium 111 (342 words)
  Following the 80th Meeting of the Bureau in Bled, Slovenia, the name roentgenium for the element of atomic number 111, with symbol Rg was officially approved as of 1 November 2004.
The IUPAC Council, at its meeting at Ottawa, Canada in 2003, delegated the authority to approve a name for the element of atomic number 111 to the Bureau.
Priority of discovery of Roentgenium by the Hofmann et al.
The Element Roentgenium (326 words)
Roentgenium is a chemical element in the periodic table that has the symbol Rg (formerly temporarily Uuu) and atomic number 111.
Roentgenium was discovered by S. Hofmann at the Gesellschaft für Schwerionenforschung in Darmstadt, Germany in 1994
Check out Roentgenium on the Periodic Table which arranges each chemical element according to its atomic number, as based on the periodic law, so that chemical elements with similar properties are in the same column.
  More results at FactBites »

 
 

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