Technetium

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Technetium is a silver-gray radioactive element and it is located in the D-block with an atomic number of 43. Most of the Tc-99 is produced synthetically, where natural occurrences of the element are rarely formed by fission in uranium in the crust of the earth. Tc-99 is the most common isotope with a radioactive half-life of 212,000 years and it can mainly be found in nuclear reactors.
Technetium was originally discovered by three german chemists, Ida Noddack-Tacke, Walter Noddack and Otto Berg, whom had published an article stating the discovery of “Masurium” in 1925, however at the given time because they were unable to verify the existence of “Masurium,” the International Union of Pure and Applied Chemistry excluded their discovery. It was believed that Masurium was presumably Technetium due to the chemical properties and atomic number being very similar. Technetium was later discovered and proved in the form of Technetium-97 by two assistant researches of University of California in Berkeley, Emilio Segre and Carlo Perrier. In 1937 the discovery originated from a sample of mol...

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