Technetium
Technetium | |
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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.
Contents
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
- ↑ http://education.jlab.org/itselemental/ele043.html
- ↑ http://www.newworldencyclopedia.org/entry/Technetium
- ↑ http://www.rsc.org/periodic-table/element/43/technetium
External Resources
http://www.rsc.org/periodic-table/element/43/technetium
Periodic Table of the Elements | ||||||||||||||||||||||||
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
43
Tc [97] |
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*Lanthanides | ||||||||||||||||||||||||
**Actinides | ||||||||||||||||||||||||