Atomic Number (# of protons)

86

Mass (amu)

(222)

Density

9.73 g/liter (0⁰C, 1 atm)

Electron Configuration

[Xe]4f¹⁴5d¹⁰6s²p⁶

Oxidation States (bold = most stable)

Not Available

Atomic Radius (pm)

Not Available

Ionic Radius (pm)

Not Available

Electronegativity

1.9

Melting Point (⁰C, 1 atm)

-71

Electron Affinity (eV)

Not Stable

Boiling Point(⁰C, 1 atm)

-62

1^st Ionization energy (eV)

10.75

Enthalpy of Fusion (kJ/mole)

2.89

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

16.4

3^rd Ionization Energy (eV)

Specific Heat Capacity ( J/ (g K), 25⁰C, 1 atm)

0.09