The Mineralogy of Roentgenium
| General Properties | |
|---|---|
| Symbol: | Rg |
| Atomic Number: | 111 |
| Standard atomic weight (Ar): | [280] |
| Electron configuration: | [Rn].5f14.6d10.7s1 |
| Atomic Properties | |
|---|---|
| Atomic Radius: | 138 pm - predicted value |
| Physical Properties | |
|---|---|
| Metal/Non-Metal: | transition metal |
| Main isotopes of Roentgenium | ||||
|---|---|---|---|---|
| Isotope | % in Nature | Half Life | Decay type | Decay product |
| 279Rg | synthetic | 0.17s | α | 275Mt |
| 280Rg | synthetic | 3.6s | α | 276Mt |
| 281Rg | synthetic | 17(+6/-3)s | Spontaneous fission | |
| α | 277Mt | |||
| 282Rg | synthetic | 2.1(+1.4/-0.6)min | α | 278Mt |
| Other Information | |
|---|---|
| Year Discovered: | 1994 |
| Discovered By: | Gesellschaft für Schwerionenforschung |
| Named For: |  Wilhelm Röntgen |
| External Links: | WikipediaWebElementsLos Alamos National LaboratoryTheodore Gray's PeriodicTable.com |
| Periodic Table | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Darmstadtium << Roentgenium >> Copernicium | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spotted a mistake/omission? - These pages are a work in progress, so please send all comments/corrections to jolyon@mindat.org. Thank you.
Constants and physical property data from:
David R. Lide (ed.), CRC Handbook of Chemistry and Physics, 85th Edition. CRC Press. Boca Raton, Florida (2005).
Kaye and Laby Tables of Physical & Chemical Constants (2005). Section 3.1.3, Abundances of the elements
A. Earnshaw, N. Greenwood, Chemistry of the Elements, 2nd edition, Butterworth-Heinemann, (1997)
Thomas J. Ahrens (ed.), Global Earth Physics : A Handbook of Physical Constants, American Geophysical Union (1995)
L.B. Railsback, An Earth Scientist's Periodic Table of the Elements and Their Ions : Geology 31:9 p737-740 (2003)
Emsley, J. Nature's Building Blocks: An A-Z Guide to the Elements. New York: Oxford University Press (2001)