Periodic Table of Elements showing Einsteinium actinide elements





Einsteinium

ElementEinsteinium
SymbolEs
Atomic Number99
Molar Mass252.08 g mol-1
Electron Configuration[Rn]5f117s2
Normal Statesolid metal
Density @STP g cm-3
Melting Point860oC
Boiling PointoC
Stable Isotopesnone
Atomic Radius
Ionic Radius98 (3+) pm
Electronegativity (Pauling)1.3
Ionization Energy (1st)619 kJ mol-1
Ionization Energy (2nd)1216 kJ mol-1
Ionization Energy (3rd)2325 kJ mol-1
Molar Heat Capacity J K-1mol-1
Standard Molar Entropy J K-1mol-1
Enthalpy of Fusion kJ mol-1
Enthalpy of Vapourization kJ mol-1
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