The chemical element roentgenium is classed as a transition metal. It was discovered in 1994 by research scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany.
|Classification:||Roentgenium is a transition metal|
|Atomic weight:||(281), no stable isotopes|
|Neutrons in most abundant isotope:||170|
|Electron configuration:||[Rn] 5f14 6d9 7s2|
|Density @ 20oC:|
Reactions, Compounds, Radii, Conductivities
|Specific heat capacity||–|
|Heat of fusion||–|
|Heat of atomization||–|
|Heat of vaporization||–|
|1st ionization energy||–|
|2nd ionization energy||–|
|3rd ionization energy||–|
|Minimum oxidation number||–|
|Min. common oxidation no.||–|
|Maximum oxidation number||–|
|Max. common oxidation no.||–|
|Electronegativity (Pauling Scale)||–|
|Reaction with air||–|
|Reaction with 15 M HNO3||–|
|Reaction with 6 M HCl||–|
|Reaction with 6 M NaOH||–|
|Ionic radius (1+ ion)||–|
|Ionic radius (2+ ion)||–|
|Ionic radius (3+ ion)||–|
|Ionic radius (1- ion)||–|
|Ionic radius (2- ion)||–|
|Ionic radius (3- ion)||–|
Discovery of Roentgenium
Roentgenium was first made by research scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany in 1994.
The scientists bombarded nickel-64 with bismuth-209 in a heavy ion accelerator.
The element is named after physicist Wilhelm Conrad Röntgen who discovered X-rays in 1895.
Appearance and Characteristics
Roentgenium is harmful due to its radioactivity.
Roentgenium is a synthetic radioactive metal and has only been produced in minute amounts.
Uses of Actinium
Roentgenium is of research interest only.
Abundance and Isotopes
Abundance earth’s crust: nil
Abundance solar system: parts per billion by weight, parts per trillion by moles
Cost, pure: $ per 100g
Cost, bulk: $ per 100g
Source: Roentgenium is a synthetic radioactive metal, created via nuclear bombardment, and has only been produced in minute amounts. Roentgenium is produced by bombarding 209Bi with 64Ni in a heavy ion accelerator.
Isotopes: Roentgenium has 7 isotopes whose half-lives are known, with mass numbers from 272 to 282. None are stable. The most stable isotope is 281Rg, with a half-life of 23 seconds.
Cite this Page
For online linking, please copy and paste one of the following:
<a href="https://www.chemicool.com/elements/roentgenium.html">Roentgenium Element Facts</a>
To cite this page in an academic document, please use the following MLA compliant citation:
"Roentgenium." Chemicool Periodic Table. Chemicool.com. 09 Oct. 2012. Web. <https://www.chemicool.com/elements/roentgenium.html>.