Source: wikibot/technetium
= Technetium
{wiki=Technetium}
Technetium (Tc) is a chemical element with the atomic number 43. It is the lightest element that does not have stable isotopes, and all of its isotopes are radioactive. Technetium was first artificially produced in 1937 by Italian scientists Carlo Perrier and Emilio Segrè, who discovered it by isolating it from a sample of uranium irradiated in a cyclotron.