Technetium Facts

Technetium Facts
Technetium (Tc) has an atomic number of forty-three. This element, found in several different types of stars, is extremely rare.
Interesting Technetium Facts:
Dmitri Mendeleev predicted an element forty-three in his periodic table nearly seventy years before technetium was discovered.
He thought it would have properties very close to manganese, and even named it ekamanganese.
Scientists in 1846, 1847, 1877, 1896, 1908, and 1925 all published reports that they had discovered Mendeleev's predicted element 43.
All of those reports turned out to be different elements.
In 1937, Emilio Segre and Carlo Perrier published the results of their experiment in which they isolated technetium from a sample of molybdenum.
Astronomers have since detected technetium's spectral signature in a number of stars.
Technetium serves a key role in nuclear medicine.
This is because technetium produces beta particles without gamma rays.
Technetium is the only element that is artificially produced.
This property gives technetium its name, from the Greek for "artificial."
Technetium is a radioactive metal that looks a lot like platinum.
Technetium has the second largest magnetic penetration depth after niobium.
Solid metallic technetium is shiny and has a slow rate of oxidation to tarnish in air.
In its powdered form, technetium will burn.
Technetium has the lowest atomic number of any solely radioactive element.
Technetium has no stable isotopes, as all of its isotopes are radioactive.
There is only one other element, promethium, in the first eighty-two to have no stable isotopes.
Thirty-six known isotopes of technetium have been created.
The most stable of these technetium radioisotopes have half-lives ranging from over 200,000 years to over four million years.
Twenty-nine of the radioisotopes have half-lives of under an hour.
Only miniscule amounts of technetium occur in the Earth's crust, and these are found in uranium ores.
For every kilogram of uranium, there is a predicted one nanogram of technetium.
However, large quantities of technetium are produced annually from spent nuclear fuel rods.
The long half-life of technetium causes concern for the disposal of this form of nuclear waste.

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