Difference between revisions of "Technetium"
Jump to navigation
Jump to search
(New page: {{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | class=Metallic | cstructure=Hexagonal | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emil...) |
(Specifying the isotope of the half-life) |
||
| (10 intermediate revisions by 8 users not shown) | |||
| Line 1: | Line 1: | ||
| − | {{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | class=Metallic | cstructure=Hexagonal | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emillo G. Segre | origname=from the Greek ''tekhnetos'', meaning ''artificial''. | uses=Source of | + | {{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | meltingpoint=3915 °F (2157 °C or 2430 K) | boilingpoint=7709 °F (4265 °C or 4538 K) | density=11 g/cm<sup>3</sup> | class=Metallic | cstructure=Hexagonal | stableisotopes=0 | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emillo G. Segre | origname=from the Greek ''tekhnetos'', meaning ''artificial''. | uses=Source of radiation for medical research. | obtained=Manufactured by bombarding [[Molybdenum]] with [[heavy hydrogen]] in a [[cyclotron]]. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238. }} |
| + | '''Technetium''' ''(tek-NEE-she-em)'' is a [[radioactive]], silvery-grey synthetic [[metal]]. Out of all the elements, it is the lightest one whose [[isotopes]] are all radioactive. Its longest-lived isotope <sup>97</sup>Tc has a ([[beta radiation|beta]]) [[half-life]] of 4.2 million years. | ||
| + | ==History== | ||
| + | In 1937, the Italian chemists Carlo Perrier and Emilio Segrè isolated Technetium using a cyclotron; it was the first artificially produced (synthetic) element. Since this element has such a short half-life, it cannot be found in nature.<ref>http://education.jlab.org/itselemental/ele043.html</ref> Before this time, it had been predicted but never found.<ref>http://www.newworldencyclopedia.org/entry/Technetium</ref> | ||
| + | |||
| + | ==Uses== | ||
| + | The primary use of Technetium is for medical exploration as a tracer. It can also be added to steel for corrosion resistance. This not usually practical, however, since it is a radioactive material.<ref>http://www.rsc.org/periodic-table/element/43/technetium</ref> | ||
| + | |||
==References== | ==References== | ||
| − | + | <references /> | |
| + | ==External Resources== | ||
| + | http://www.rsc.org/periodic-table/element/43/technetium | ||
[[Category:Elements]] | [[Category:Elements]] | ||
| + | [[Category:Metals]] | ||
| + | {{Periodic table}} | ||
Latest revision as of 02:55, November 6, 2022
Technetium (tek-NEE-she-em) is a radioactive, silvery-grey synthetic metal. Out of all the elements, it is the lightest one whose isotopes are all radioactive. Its longest-lived isotope 97Tc has a (beta) half-life of 4.2 million years.
| Technetium | |
|---|---|
| Properties | |
| Atomic symbol | Tc |
| Atomic number | 43 |
| Classification | Metallic |
| Atomic mass | 97 amu |
| Number of Stable Isotopes | 0 |
| Melting point (°C) | 3915 °F (2157 °C or 2430 K) |
| Boiling point (°C) | 7709 °F (4265 °C or 4538 K) |
| Density (grams per cc) | 11 g/cm3 |
| Other Information | |
| Date of discovery | 1937 |
| Name of discoverer | Carlo Perrier and Emillo G. Segre |
| Name origin | from the Greek tekhnetos, meaning artificial. |
| Uses | Source of radiation for medical research. |
| Obtained from | Manufactured by bombarding Molybdenum with heavy hydrogen in a cyclotron. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238. |
History
In 1937, the Italian chemists Carlo Perrier and Emilio Segrè isolated Technetium using a cyclotron; it was the first artificially produced (synthetic) element. Since this element has such a short half-life, it cannot be found in nature.[1] Before this time, it had been predicted but never found.[2]
Uses
The primary use of Technetium is for medical exploration as a tracer. It can also be added to steel for corrosion resistance. This not usually practical, however, since it is a radioactive material.[3]