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Technetium
An ultra-rare radioactive metal found in trace amounts in U and Th ores where it arises from nuclear fission. It occurs at higher levels in some stars.
Radiation symbol Radiation symbol.
Sadly we have not yet been able to source a good sample of technetium. This is due to the fact that all isotopes are powerfully radioactive. A visible amount would be too dangerous to display. So as with many of the transuranic radioactive elements, this symbol is a stand-in.
Source: scientific supply company
Size: 2"
Purity: n/a