Atomic Number (# of protons)

68

Mass (amu)

167.3

Density

9.07 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Xe]4f¹²6s²

Oxidation States (bold = most stable)

+3

Atomic Radius (pm)

173

Ionic Radius (pm)

(+3)100

Electronegativity

1.1

Melting Point (⁰C, 1 atm)

1529

Electron Affinity (eV)

Not Available

Boiling Point(⁰C, 1 atm)

2868

1^st Ionization energy (eV)

6.11

Enthalpy of Fusion (kJ/mole)

17.2

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

261.0

3^rd Ionization Energy (eV)

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

0.17