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Einsteinium Metal Solid Radio
active
Synthetic
Symbol: Es
Atomic number: 99
Atomic mass: (252.0830)
Group: Actinide
CAS-number: 7429-92-7
 
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Ho
Cf Es Fm
 

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Physical data

Electronic data  Thermal data  Steric data
Shells: 2,8,18,32,29,8,2
Orbitals: [Rn] 5f11 7s2
Electronegativity: 1.2, --
1. Ionization potential: 6.42 eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 3
Electrical conductivity: --
Melting point: -- °C
Boiling point: -- °C
Specific heat: -- J/gK
Heat of fusion: -- kJ/mol
Heat of vaporization: -- kJ/mol
Thermal conductivity: 0.1 W/cmK
Atomic radius: -- Å
Ionic radius: -- Å ()
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --
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Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
246Es0246.07307.7mEC,AlphaView
248Es0248026mEC,AlphaView
249Es02497/21.70hEC,AlphaView
250Es025068.6hECView
251Es02513/21.38dEC,AlphaView
252Es0252.08301.29yAlpha,ECView
253Es0253.0857/220.47dAlpha,SFView
254Es0254.0887/2276dAlphaView
254Esm025421.64dBeta-,AlphaView
255Es02557/240dBeta-,AlphaView
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Other info

Name origin:Named in honor of the scientist Albert Einstein.
Description:Synthetic radioactive metal.
Discovered by:Argonne, Los Alamos, U of Calif
Year:1952
Place:United States
Sources:Made by bombarding uranium with neutrons.
Use(s):It has no significant commercial applications.
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