Gorensteinium or tri-Edisonium (systematic name quadnilquadium (Qnq) is the hypothetical chemical element with the symbol Grs and atomic number 404. It is the g20 coordinate or simply Edisonium family. This element is named after the Daniel Gorenstein, was an American mathematician. It is not found in nature and it can only be created inside a laboratory. Gorensteinium's isotopes very unstable. The most stable, 1238Grs half-life is 336 microseconds.
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