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Technetium

Chemical element with atomic number of 43

All edits by  Sergey Kostin 

Edits on 8 Feb, 2022
Sergey Kostin
Sergey Kostin edited on 8 Feb, 2022
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Sergey Kostin
Sergey Kostin edited on 8 Feb, 2022
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Technetium (chemical symbol - Tc, from Lat. Technetium) is a chemical element of the 7th group (according to the outdated classification - the seventh group of the secondary subgroup, VIIB), the fifth period of the periodic system of chemical elements of D. I. Mendeleev, with atomic number 43.

A simple substance technetium is a radioactive transition metal of silver-gray color. The lightest element with no stable isotopes. [2] [3]The first of the synthesized chemical elements.

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Only about 18,000 tons of naturally formed technetium could be found at any given time in the earth's crust before the beginning of the nuclear era. Natural technetium is a product of spontaneous fission of uranium ore and thorium ore or a product of neutron capture in molybdenum ores. The most common natural isotope is 99Tc. The rest of the technetium on Earth is produced synthetically as a product of fission of uranium-235 and other fissile nuclei in nuclear reactors of all types (energy, military, research, propulsion

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