Atomic Number (# of protons)

67

Mass (amu)

164.9

Density

8.80 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Xe]4f¹¹6s²

Oxidation States (bold = most stable)

+3

Atomic Radius (pm)

175

Ionic Radius (pm)

(+3)103

Electronegativity

1.1

Melting Point (⁰C, 1 atm)

1474

Electron Affinity (eV)

Not Available

Boiling Point(⁰C, 1 atm)

2700

1^st Ionization energy (eV)

6.02

Enthalpy of Fusion (kJ/mole)

11.76

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

241.0

3^rd Ionization Energy (eV)

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

0.17