Technetium: Difference between revisions
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imported>David Yamakuchi m (New page: {{subpages}} {{Basic elemental info}}) |
imported>Milton Beychok m (Replaced the infobox, expanded the lede and added a references section.) |
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{{Elem_Infobox | |||
|elName=Technetium | |||
|eltrnCfg=1s<sup>2</sup>2s<sup>2</sup>2p<sup>6</sup>3s<sup>2</sup>3p<sup>6</sup>3d<sup>10</sup>4s<sup>2</sup> | |||
4p<sup>6</sup>4d<sup>5</sup>5s<sup>2</sup> | |||
|no1= | |||
|no2= | |||
|no3= | |||
|no4= | |||
|properties=Silvery-gray, crystalline metal. | |||
|compounds= | |||
|uses= | |||
|hazard= | |||
}} | |||
'''Technetium''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] Tc. Its [[atomic number]] (the number of [[proton]]s) is 43. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 98 g•mol<sup> −1</sup> and is a [[solid]] in its elemental form. | |||
Technetium is considered to be a member of the "Synthetic" class of elements. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] of 4,265 °[[Celsius (unit)|C]] and a melting point of 2,157 °C. | |||
All the isotopes of technetium are radioactive. Only very small amounts of technetium are found in nature. Practically all technetium is produced synthetically as a by-product of the fission of [[Uranium|uranium-235]] in nuclear reactors and it is extracted from the spent reactor fuel rods.<ref>{{cite book|author=John Elmsley|title=Nature's Building Blocks: An A-Z Guide to the Elements|edition=1st Edition|publisher=Oxford University Press|year=2001|id=ISBN 0-19-850341-5}}</ref> | |||
==References== | |||
{{reflist}} | |||
Revision as of 23:15, 21 April 2011
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Technetium is a chemical element, having the chemical symbol Tc. Its atomic number (the number of protons) is 43. It has a standard atomic weight of 98 g•mol −1 and is a solid in its elemental form.
Technetium is considered to be a member of the "Synthetic" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 4,265 °C and a melting point of 2,157 °C.
All the isotopes of technetium are radioactive. Only very small amounts of technetium are found in nature. Practically all technetium is produced synthetically as a by-product of the fission of uranium-235 in nuclear reactors and it is extracted from the spent reactor fuel rods.[1]
References
- ↑ John Elmsley (2001). Nature's Building Blocks: An A-Z Guide to the Elements, 1st Edition. Oxford University Press. ISBN 0-19-850341-5.