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Superheavy elements, also known as transactinide elements, transactinides, or super-heavy elements, or superheavies for short, are the chemical elements with atomic number greater than 104. [1] The superheavy elements are those beyond the actinides in the periodic table; the last actinide is lawrencium (atomic number 103).
Dawn Angela Shaughnessy is an American radiochemist and principal investigator of the heavy element group at the Lawrence Livermore National Laboratory. [3] She was involved in the discovery of five superheavy elements with atomic numbers 114 to 118.
Despite these unsuccessful attempts to observe long-lived superheavy nuclei, [34] new superheavy elements were synthesized every few years in laboratories through light-ion bombardment and cold fusion [k] reactions; rutherfordium, the first transactinide, was discovered in 1969, and copernicium, eight protons closer to the island of stability ...
Although the IUPAC systematic names are widely used in the chemical community on all levels, from chemistry classrooms to advanced textbooks, scientists who work theoretically or experimentally on superheavy elements typically call it "element 120", with the symbol E120, (120) or 120.
Seaborgium is a synthetic chemical element; it has symbol Sg and atomic number 106. It is named after the American nuclear chemist Glenn T. Seaborg.As a synthetic element, it can be created in a laboratory but is not found in nature.
Super Heavy or Superheavy may refer to: Superheavy element; SuperHeavy, a supergroup band, 2009–2011 SuperHeavy, the single 2011 album released by the band SuperHeavy; SpaceX Super Heavy, the reusable first stage of the SpaceX Starship launch vehicle; Super-heavy tank; Super heavy-lift launch vehicle, the most capable class of orbital rockets
The name was coined by David Strauss in response to a request from the show's creator. [99] 40 K is a natural isotope, used to date rocks. But the method of getting quantium as described has not been shown in real life. 61 Pm Promethium: DC Comics: Artificial element in the DC Universe, created by Dayton Industries.
In 1996, the Russian team proposed the name becquerelium after Henri Becquerel. [59] The American team in 1997 proposed the name hahnium [60] after Otto Hahn (previously this name had been used for element 105). The name darmstadtium (Ds) was suggested by the GSI team in honor of the city of Darmstadt, where the element was discovered.