Atomic Number (# of protons)

84

Mass (amu)

(209)

Density

9.3 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Xe]4f¹⁴5d¹⁰6s²p⁴

Oxidation States (bold = most stable)

+4,+2

Atomic Radius (pm)

118

Ionic Radius (pm)

(+4)-

Electronegativity

1.8

Melting Point (⁰C, 1 atm)

254

Electron Affinity (eV)

1.9

Boiling Point(⁰C, 1 atm)

962

1^st Ionization energy (eV)

8.42

Enthalpy of Fusion (kJ/mole)

Not Available

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

60.3

3^rd Ionization Energy (eV)

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

Not Available