Esn.
/ˌiːˈɛs/, U.S. /ˌiˈɛs/ Chemistry.
The element einsteinium.
ΚΠ
1957 Science 4 Oct. 648/1 The Commission on Inorganic Nomenclature..has officially adopted the following symbols for chemical elements: Ar, argon; Es, einsteinium..; and No, nobelium.
1990 G. T. Seaborg & N. D. Loveland Elements beyond Uranium v. 213 In the case of 241Am or 254Es or similar nuclei, moderate or high energy photons are emitted in the decay of the parent nuclide or its daughter.
2006 Coordination Chem. Rev. 250 777/1 They were able to demonstrate the stability of the divalent state of Es in reactions with hexafluoropropene.
This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022).
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also refers to : es-prefix
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n.1957see also