What is einsteinium?

  • (noun): A radioactive transuranic element produced by bombarding plutonium with neutrons.
    Synonyms: Es, E, atomic number 99


Einsteinium is a synthetic element with the symbol Es and atomic number 99. It is the seventh transuranic element, and an actinide.

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Some articles on einsteinium:

List Of CAS Numbers By Chemical Compound - E
... erbium(III) sulfide 12159-66-9 Er2Te3 erbium(III) telluride 12020-39-2 EsBr2 einsteinium(II) bromide 70292-43-2 EsBr3 einsteinium(III) bromide 72461-17-7 EsCl2 einsteinium(II ...
Einsteinium - Safety
... Most of the available einsteinium toxicity data originates from research on animals ... Upon ingestion by rats, only about 0.01% einsteinium ends in the blood stream ... half-life about 20 years, although this is rendered irrelevant by the short half-lives of einsteinium isotopes), 0.035% to the testicles or 0.01% to the ovaries – where ...
Isotope Lists, 97+ - Einsteinium
... Main article Isotopes of einsteinium Isotope Half-life Spin Parity Mode(s) or Abundance 241Es 9 s %α=100 242Es 40 s %α ~ 100, %KSF=1.4 243Es 21 s %K < 70, %α > 30 ...
Actinide - Discovery, Isolation and Synthesis - Plutonium and Above
... Einsteinium and fermium were identified in 1952–1953 in the fallout from the "Ivy Mike" nuclear test (1 November 1952), the first successful test of a hydrogen bomb ... uranium-255, and their β-decay yielded einsteinium-253 and fermium-255 ... Nevertheless, the Berkeley team were able to prepare einsteinium and fermium by civilian means, through the neutron bombardment of plutonium-239, and published this work in 1954 with the ...