Einsteinium
Einsteinium
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Einsteinium ΒΆ
AtomicNumber: 99
Element: Einsteinium
Symbol: Es
AtomicMass: 252.0
NumberofNeutrons: 153
NumberofProtons: 99
NumberofElectrons: 99
Period: 7
Group: nan
Phase: artificial
Radioactive: yes
Natural: nan
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Actinide
AtomicRadius: nan
Electronegativity: 1.3
FirstIonization: 6.42
Density: 13.5
MeltingPoint: 1133.15
BoilingPoint: nan
NumberOfIsotopes: 123.0
Discoverer: Ghiorso et al.
Year: 1952.0
SpecificHeat: nan
NumberofShells: 7
NumberofValence: nan