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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 Facts, Symbol, Discovery, Properties, Uses - Chemistry Learner
    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 information, properties and uses | Periodic Table
    Element Einsteinium (Es), Group 20, Atomic Number 99, f-block, Mass [252] Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Einsteinium: 100 years after Einstein’s Nobel Prize, researchers reveal . . .
    Einsteinium (Es) is the 99th element in the periodic table It was first discovered in 1952 when a thermonuclear device dubbed “Ivy Mike” was detonated on the island of Elugelab in the Pacific
  • Einsteinium: Element 99 - Properties, Uses, and Facts
    Explore the fascinating world of Einsteinium, Element 99 Discover its history, physical and chemical properties, uses, and applications Understand the scientific importance of this highly radioactive and synthetic element
  • Einsteinium (Es) - Definition, Preparation, Properties, Uses . . . - Examples
    Einsteinium, with the symbol Es and atomic number 99, is a synthetic element that belongs to the actinide series of the periodic table Known for its radioactivity and synthetic origin, Einsteinium has a complex atomic structure that contributes to its unique chemical and physical properties
  • Einsteinium - Chemistry Encyclopedia - elements, metal, number, name . . .
    The name einsteinium was chosen for element 99, in honor of the great scientist Albert Einstein Einsteinium isotopes of masses 241 through 256 are known All are radioactive, decaying by α -particle emission, electron capture, spontaneous fission , and β -decay
  • Einsteinium (Es) Element: Important Properties, Discovery, Uses, Effects
    Einsteinium is a synthetic chemical element with an atomic number of 99 and is represented by the symbol ‘Es’ in the periodic table It is silvery in appearance and belongs to the f-block of period 7 of the periodic table Einsteinium was identified as the seventh synthetic trans-uranium element in the actinide series Similar to other
  • Einsteinium Facts - Element 99 or Es - ThoughtCo
    Einsteinium is a soft silver radioactive metal with atomic number 99 and element symbol Es Its intense radioactivity makes it glow blue in the dark The element is named in honor of Albert Einstein Einsteinium was first identified in the fallout from the first hydrogen bomb explosion in 1952, the Ivy Mike nuclear test





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