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einsteinium

   Also found in: Dictionary/thesaurus, Financial, Acronyms, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
einsteinium /ein·stei·ni·um/ (Es) (īn-sti´ne-um) a chemical element, at. no. 99.
ein·stein·i·um (n-stn-m)
n. Symbol Es
A radioactive transuranic element synthesized by neutron irradiation of plutonium or other elements. Its longest-lived isotope is Es 254 with a half-life of 275 days. Atomic number 99.
einsteinium (Es)
[īnstī′nē·əm]
Etymology: Albert Einstein, German-born physicist and Nobel laureate, 1879-1955
a synthetic transuranic metallic element. Its atomic number is 99. The mass of its longest-lived, best-known isotope is 254. Einsteinium was first found in the debris from a hydrogen bomb explosion. It decays rapidly into berkelium.
einsteinium
a chemical element, atomic number 99, atomic weight 254, symbol Es. See Table 6.


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The compilation includes data for the neutral and singly ionized atoms of all elements hydrogen through einsteinium (1 through 99).
Handbook of basic atomic spectroscopic data available online by Journal of Research of the National Institute of Standards and Technology
Latest example, The Only Element That Matters is Einsteinium 7" by The Locust on I Don't Feel A Thing Records.
Notes from the underground by Thrasher
The idea that an element has never been named after a living scientist is incorrect, since elements 99 and 100 were named einsteinium and fermium while Einstein and Fermi were alive, though the names were not sanctioned officially until after they had died.
Elemental upset by Science News
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