Difference between revisions of "Technetium"
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{{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. }} | {{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. | + | '''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== | ==History== | ||
Latest revision as of 02:55, November 6, 2022
| 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. |
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.
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]
References
External Resources
http://www.rsc.org/periodic-table/element/43/technetium
| Periodic Table of the Elements | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
| *Lanthanides | ||||||||||||||||||||||||
| **Actinides | ||||||||||||||||||||||||