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n. Symbol Es
A synthetic transuranic element first produced by neutron irradiation of uranium in a thermonuclear explosion and now usually produced in the laboratory by irradiating plutonium and other elements. The isotopes with the longest half-lives are Es-252 (472 days) and Es-254 (276 days). Atomic number 99; melting point 860°C (estimated); valence 2, 3. See Periodic Table.

[After Albert Einstein.]


(Elements & Compounds) a metallic transuranic element artificially produced from plutonium. Symbol: Es; atomic no: 99; half-life of most stable isotope, 252Es: 276 days
[C20: New Latin, named after Albert Einstein]


(aɪnˈstaɪ ni əm)

a transuranic element. Symbol: Es; at. no.: 99.
[1950–55; after Albert Einstein; see -ium2]


Symbol Es A synthetic, radioactive metallic element of the actinide series that is usually produced by bombarding plutonium or another element with neutrons. The most stable isotope of einsteinium has a half-life of 1.3 years. Atomic number 99. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.einsteinium - a radioactive transuranic element produced by bombarding plutonium with neutronseinsteinium - a radioactive transuranic element produced by bombarding plutonium with neutrons
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
References in periodicals archive ?
Maybe that will explain the definitions of the Sponsorship prices: Nobelium, $2,000 for eight tickets; Einsteinium, $1,000, six tickets; and Xenon, $500, four tickets.
They were, Curium - (Marie & Pierre Curie); Californium - (first produced in California); Einsteinium - (Albert); Fermium - (Enrico Fermi, Physicist); Mendelevium - (Dmitri Mendeleev); Bohrium - (Neils Bohr, Atomic Physicist); Dubnium - (named after a Russian Town of Dubnia); Tennessine - (Discovered in the National Laboratory of Tennessee).