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Einsteinium is a synthetic chemical element; it has symbol Es and atomic number 99. It is named after Albert Einstein and is a member of the actinide series and the seventh transuranium element. Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952.
One of Ghiorso's breakthrough instruments was a 48-channel pulse height analyzer, which enabled him to identify the energy, and therefore the source, of the radiation. During this time they discovered two new elements (95, americium and 96, curium), although publication was withheld until after the war. [9]
Named for the University of California, Berkeley, where it was discovered. The city of Berkeley itself was named after George Berkeley. Californium (Cf) 98 California English toponym Named for the state of California, US, and for University of California, Berkeley. The origin of the name California is disputed. Einsteinium (Es) 99 Einstein ...
Einsteinium is the heaviest element that has been produced in macroscopic quantities. [4] Transuranic elements that have not been discovered, or have been discovered but are not yet officially named, use IUPAC's systematic element names. The naming of transuranic elements may be a source of controversy.
It was the sixth transuranium element to be discovered; the team announced its discovery on March 17, 1950. [29] [30] To produce californium, a microgram-size target of curium-242 (242 96 Cm) was bombarded with 35 MeV alpha particles (4 2 He) in the 60-inch-diameter (1.52 m) cyclotron at Berkeley, which produced californium-245 (245 98 Cf
Seaborg was the principal or co-discoverer of ten elements: plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium and element 106, which, while he was still living, was named seaborgium in his honor. He said about this naming, "This is the greatest honor ever bestowed upon me—even better, I think ...
Element 99 (einsteinium) was quickly discovered on filter papers which had been flown through clouds from the explosion (the same sampling technique that had been used to discover 244 94 Pu). [8] It was then identified in December 1952 by Albert Ghiorso and co-workers at the University of California at Berkeley.
helium: named for the Sun where it was discovered by spectral analysis, being associated with the deity Helios, iridium: named for the Greek goddess Iris, tellurium: named for the Roman goddess of the earth, Tellus Mater, niobium: named for Niobe, a character of Greek mythology, vanadium: named for Vanadis, another name for Norse goddess Freyja,