|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|
|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.
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. Before this time, it had been predicted but never found.
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.
|Periodic Table of the Elements|