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einsteinium    
n. 锿

□

einsteinium
n 1: a radioactive transuranic element produced by bombarding
plutonium with neutrons [synonym: {einsteinium}, {Es}, {E},
{atomic number 99}]

Es \Es\ n.
the chemical symbol for {einsteinium}, a transuranic element
with atomic number 99. The atomic weight of the longest-lived
isotope, with a half-life of 276 days, is 254. The first
isotope discovered, having atomic weight 253 and a half-life
of 20 days, was recognized in 1952 in the debris from a
hydrogen bomb test. As much as 3 micrograms of einsteinium
were produced by a complex process involving long irradiation
of plutonium isotopes in nuclear reactors. Its chemical
properties are those of a trivalent actinide element. --HCP61

Syn: einsteinium, atomic number 99.
[WordNet 1.5 PJC]

einsteinium
Symbol: Es
Atomic number: 99
Atomic weight: (254)
Appearance is unknown, however it is most probably metallic and silver
or gray in color. Radioactive metallic transuranic element belonging to
the
actinoids. Es-254 has the longest half-life of the eleven known isotopes
at
270 days. First identified by Albert Ghiorso and associates in the
debris of
the 1952 hydrogen bomb explosion. In 1961 the first microgram quantities
of
Es-232 were separated. While einsteinium never exists naturally, if a
sufficient amount was assembled, it would pose a radiation hazard.

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  • Einsteinium - Wikipedia
    Einsteinium is a synthetic chemical element; it has symbol Es and atomic number 99 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
  • Einsteinium | Radioactive, Synthetic, Actinide | Britannica
    einsteinium (Es), synthetic chemical element of the actinoid series of the periodic table, atomic number 99 Not occurring in nature, einsteinium (as the isotope einsteinium-253) was first produced by intense neutron irradiation of uranium -238 during the detonation of nuclear weapons
  • Einsteinium - Element information, properties and uses . . .
    Element Einsteinium (Es), Group 20, Atomic Number 99, f-block, Mass [252] Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Einsteinium Facts, Symbol, Discovery, Properties, Uses
    Einsteinium (pronounced as ine-STINE-ee-em) is a radioactive metal, belonging to the family of transuranium elements, and denoted by the chemical symbol Es It has 16 isotopes out of which einsteinium-252 is the most stable one with a half-life of 47 1 days [2, 3]
  • Einsteinium: Element 99 - Properties, Uses, and Facts
    Einsteinium is a solid at room temperature and exhibits metallic properties typical of actinides Einsteinium was discovered in 1952 by a team of scientists led by Albert Ghiorso at the Lawrence Berkeley National Laboratory
  • Einsteinium: Element Properties and Uses - samaterials. com
    Einsteinium (Es) is a highly radioactive, synthetic metal with an atomic number of 99 It glows in the dark due to its intense radioactivity and is primarily used in scientific research, including the production of heavier elements
  • Einsteinium | Es (Element) - PubChem
    Chemical element, Einsteinium, information from authoritative sources Look up properties, history, uses, and more





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