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Technetium
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Technetium is the chemical element with atomic number 43 and symbol Tc. It is the lowest atomic number element without any stable isotopes. Nearly all of technetium is produced synthetically and only minute amounts are found in nature. Naturally occurring technetium occurs as a spontaneous fission product in uranium ore or by neutron capture in molybdenum  ores. The chemical properties of this silvery grey, crystalline transition metal are intermediate between rhenium and manganese.
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