Atomic Number (# of protons)

77

Mass (amu)

190.2

Density

22.4 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Xe]4f¹⁴5d⁷6s²

Oxidation States (bold = most stable)

+2,+3,+4,+6

Atomic Radius (pm)

136

Ionic Radius (pm)

(+4)63

Electronegativity

1.6

Melting Point (⁰C, 1 atm)

2447

Electron Affinity (eV)

1.57

Boiling Point(⁰C, 1 atm)

4428

1^st Ionization energy (eV)

9.1

Enthalpy of Fusion (kJ/mole)

26.4

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

563.6

3^rd Ionization Energy (eV)

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

0.13