Difference between revisions of "Polonium"
Physchim62 (talk | contribs) (Created page with '{{Infobox element |name = polonium |symbol = Po |left = bismuth |right = astatine |above = Te |below = Uuh |atomic-number = 84 |atomic-weight…') |
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|below = [[Ununhexium|Uuh]] | |below = [[Ununhexium|Uuh]] | ||
|atomic-number = 84 | |atomic-number = 84 | ||
| − | |atomic-weight = 210 | + | |atomic-weight = 209.983<ref group="note">Atomic weight of [[polonium-210]], which is by far the most commonly encountered isotope.</ref> |
|configuration = [Xe] 6s<sup>2</sup> 4f<sup>14</sup> 5d<sup>10</sup> 6p<sup>4</sup> | |configuration = [Xe] 6s<sup>2</sup> 4f<sup>14</sup> 5d<sup>10</sup> 6p<sup>4</sup> | ||
| − | |phys-ref = | + | |phys-ref = <ref name="G&E">{{Greenwood&Earnshaw1st|pages=882–919}}.</ref> |
|melting-point = 254 °C | |melting-point = 254 °C | ||
|boiling-point = 962 °C | |boiling-point = 962 °C | ||
| − | |density = 9.142 g cm<sup>−3</sup> | + | |density = 9.142 g cm<sup>−3</sup> (α-form) |
|IE-ref = <ref>{{RubberBible62nd|page=E-65}}.</ref> | |IE-ref = <ref>{{RubberBible62nd|page=E-65}}.</ref> | ||
|IE1 = 813.0 kJ mol<sup>−1</sup> | |IE1 = 813.0 kJ mol<sup>−1</sup> | ||
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|EC-number = | |EC-number = | ||
}} | }} | ||
| − | '''Polonium''' (symbol: '''Po''') is a [[chemical element]], one of the [[chalcogen]]s. | + | '''Polonium''' (symbol: '''Po''') is a [[chemical element]], one of the [[chalcogen]]s. It is a silvery-white metal with a unique [[simple cubic structure]],<ref name="G&E"/> although it is rare that polonium or its compounds are encountered in weighable quantities. |
| + | |||
| + | Polonium has no stable isotopes, and the metal and all its compounds are intensely radioactive. The power output due to the radioactive decay of [[polonium-210]] is about {{nowrap|140 W g<sup>−1</sup>}}, which leads to considerable self-heating and which complicates the investigation of its properties with macroscopic quantities.<ref name="G&E"/> | ||
==Notes and references== | ==Notes and references== | ||
Revision as of 16:25, 23 May 2010
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Polonium (symbol: Po) is a chemical element, one of the chalcogens. It is a silvery-white metal with a unique simple cubic structure,[1] although it is rare that polonium or its compounds are encountered in weighable quantities.
Polonium has no stable isotopes, and the metal and all its compounds are intensely radioactive. The power output due to the radioactive decay of polonium-210 is about 140 W g−1, which leads to considerable self-heating and which complicates the investigation of its properties with macroscopic quantities.[1]
Notes and references
Notes
- ↑ Atomic weight of polonium-210, which is by far the most commonly encountered isotope.
References
Further reading
- Polonium; Moyer, Harvey V., Ed.; United States Atomic Energy Commission: Oak Ridge, Tenn., 1956. TID-5221. doi:10.2172/4367751, <http://www.osti.gov/bridge/servlets/purl/4367751-nEJIbm/>.
External links
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See also the corresponding article on Wikipedia. |
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This page is currently licensed under the Creative Commons Attribution 3.0 Unported license and any later versions of that license. |
