Einsteinium$24056$ - ορισμός. Τι είναι το Einsteinium$24056$
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Τι (ποιος) είναι Einsteinium$24056$ - ορισμός

CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 99
Element 99; Athenium; Es (element); Einstenium; History of einsteinium
  • Estimated yield of transuranium elements in the U.S. nuclear tests Hutch and Cyclamen.<ref name="s40" />
  • The element was discovered by a team headed by [[Albert Ghiorso]].
  • The element was named after [[Albert Einstein]].
  • Haire]], p. 1580</ref>
  • [[Einsteinium(III) iodide]] glowing in the dark
  • [[Elution]] curves: chromatographic separation of Fm(100), Es(99), Cf, Bk, Cm and Am
  • Seaborg]], p. 51</ref>
  • Einsteinium was first observed in the fallout from the ''Ivy Mike'' nuclear test.

einsteinium         
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¦ noun the chemical element of atomic number 99, an artificially made radioactive metal of the actinide series. (Symbol: Es)
Einsteinium         
Einsteinium is a synthetic element with the symbol Es and atomic number 99. Einsteinium is a member of the actinide series and it is the seventh transuranium element.
Extended periodic table         
  • Energy eigenvalues for the 1s, 2s, 2p<sub>1/2</sub> and 2p<sub>3/2</sub> shells from solutions of the [[Dirac equation]] (taking into account the finite size of the nucleus) for ''Z''&nbsp;=&nbsp;135–175 (–·–), for the Thomas-Fermi potential (—) and for ''Z''&nbsp;=&nbsp;160–170 with the self-consistent potential (---).<ref name=Fricke/>
  • Energy eigenvalues (in eV) for the outermost electrons of elements with Z = 100 through 172, predicted using Dirac–Fock calculations. The − and + signs refer to orbitals with decreased or increased azimuthal quantum number from spin–orbit splitting respectively: p− is p<sub>1/2</sub>, p+ is p<sub>3/2</sub>, d− is d<sub>3/2</sub>, d+ is d<sub>5/2</sub>, f− is f<sub>5/2</sub>, f+ is f<sub>7/2</sub>, g− is g<sub>7/2</sub>, and g+ is g<sub>9/2</sub>.<ref name=BFricke/>
  • Kulsha's first suggested form
  • Kulsha's second suggested form
  • 512px
REFERS TO THE EXTENSION ON THE PERIODIC TABLE BEYOND ITS CURRENT 7 PERIODS INCLUDING ADDITIONAL PERIODS
Periodic table (extended); Periodic table/extended; Periodic table/Extended Table; Period 8 element; G-orbital; Period 8; Superactinide; Element 123; Untriseptium; Untrioctium; Untriennium; Untrihexium; Feynmanium; Eka-protactinium; Ekauranium; Unbipentium; Unbiseptium; Unbioctium; Unbiennium; Untrinilium; Untriunium; Untribium; Untripentium; Element 139; Element 138; Element 137; Element 136; Eka-Protactinium; Ekaprotactinium; Unquadunium; Unsepthexium; Superactinide series; Superactinides; Period 9 element; Unoctbium; Element 125; Element 127; Element 128; Element 129; Element 130; Element 131; Element 132; Unquadseptium; Unquadhexium; Untritrium; Untriquadium; G orbital; G block; Uqn; G-block; End of the periodic table; Unsepttrium; Template:Extension of the periodic table beyond the seventh period; Superactinoid; Extension of the periodic table beyond the seventh period; Unpentunium; Unquadbium; Unquadennium; Unquadnilium; Unquadoctium; Unquadpentium; Unquadquadium; Unquadtrium; Unseptbium; Unseptennium; Unseptnilium; Unseptoctium; Unseptpentium; Unseptquadium; Unseptseptium; Unseptunium; Unpenttrium; Unpentseptium; Unpentquadium; Unpentpentium; Unpentoctium; Unpentnilium; Unpenthexium; Unpentennium; Unpentbium; Unoctunium; Unocttrium; Unoctquadium; Unoctnilium; Unhexunium; Unhextrium; Unhexseptium; Unhexquadium; Unhexpentium; Unhexoctium; Unhexnilium; Unhexhexium; Unhexennium; Unhexbium; Unseptrium; Element 173; Element 152; G (Block); Isotopes of untriseptium; Element 133; Element 134; Element 135; Extended periodic table (detailed cells); Eka-neptunium; Eka-americium; Eka-curium; Eka-berkelium; Eka-californium; Eka-einsteinium; Eka-fermium; Eka-mendelevium; Eka-nobelium; Eka-lawrencium; Eka-rutherfordium; Eka-dubnium; Eka-seaborgium; Eka-bohrium; Pyykkö model; Eka-superactinide; Eka-superactinides; Period 10; Period 9; Period 10 element; Fricke model; Burkhard Fricke; Eight-period table; Element 140; Element 141; Element 142; Element 143; Element 144; Element 145; Element 146; Element 147; Element 148; Element 149; Element 150; Element 151; Element 153; Element 154; Element 155; Element 156; Element 157; Element 158; Element 159; Element 160; Element 161; Element 162; Element 163; Element 164; Element 165; Element 166; Element 167; Element 168; Element 169; Element 170; Element 171; Element 172; Element 174; Element 175; Element 176; Element 177; Element 178; Element 179; Element 180; Element 181; Element 182; Element 183; Element 184; Eka-ununoctium; Eka-hassium; Eka-meitnerium; Eka-darmstadtium; Eka-roentgenium; Eka-copernicium; Eka-flerovium; Eka-livermorium; Superlanthanide; Superlanthanides; Extended periodic table (large cells); Unsepttriium; Uoq; Utq; Uqb; Uqt; Uqq; Uqh; Uqe; Uqs; Upq; Predicted elements; Extended periodic table (large version); Biunnilium; Biseptquadium; Extended Periodic Table; Unbitrium; Extended chemical periodic table; Period 8 elements; Period 9 elements; Period 10 elements; Elements beyond oganesson; Beyond oganesson; Biunnillium; Draft:Unbitrium; Hypothetical chemical elements; Hypothetical chemical element; Hypothetical elements; Hypothetical element
An extended periodic table theorises about chemical elements beyond those currently known in the periodic table and proven. Those elements could include any beyond oganesson, which completes the seventh period (row) in the periodic table at atomic number (Z) 118.

Βικιπαίδεια

Einsteinium

Einsteinium is a synthetic element with the symbol Es and atomic number 99. Einsteinium is a member of the actinide series and it is the seventh transuranium element. It was named in honor of Albert Einstein.

Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952. Its most common isotope, einsteinium-253 (half-life 20.47 days), is produced artificially from decay of californium-253 in a few dedicated high-power nuclear reactors with a total yield on the order of one milligram per year. The reactor synthesis is followed by a complex process of separating einsteinium-253 from other actinides and products of their decay. Other isotopes are synthesized in various laboratories, but in much smaller amounts, by bombarding heavy actinide elements with light ions. Owing to the small amounts of produced einsteinium and the short half-life of its most easily produced isotope, there are currently almost no practical applications for it outside basic scientific research. In particular, einsteinium was used to synthesize, for the first time, 17 atoms of the new element mendelevium in 1955.

Einsteinium is a soft, silvery, paramagnetic metal. Its chemistry is typical of the late actinides, with a preponderance of the +3 oxidation state; the +2 oxidation state is also accessible, especially in solids. The high radioactivity of einsteinium-253 produces a visible glow and rapidly damages its crystalline metal lattice, with released heat of about 1000 watts per gram. Difficulty in studying its properties is due to einsteinium-253's decay to berkelium-249 and then californium-249 at a rate of about 3% per day. The isotope of einsteinium with the longest half-life, einsteinium-252 (half-life 471.7 days) would be more suitable for investigation of physical properties, but it has proven far more difficult to produce and is available only in minute quantities, and not in bulk. Einsteinium is the element with the highest atomic number which has been observed in macroscopic quantities in its pure form and this was the common short-lived isotope einsteinium-253.

Like all synthetic transuranium elements, isotopes of einsteinium are very radioactive and are considered highly dangerous to health on ingestion.