Atomic Number (# of protons)

94

Mass (amu)

(244)

Density

19.8 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Rn]5f⁶7s²

Oxidation States (bold = most stable)

+6,+5,+4,+3

Atomic Radius (pm)

151

Ionic Radius (pm)

Not Available

Electronegativity

1.2

Melting Point (⁰C, 1 atm)

640

Electron Affinity (eV)

Not Available

Boiling Point(⁰C, 1 atm)

Not Available

1^st Ionization energy (eV)

6.06

Enthalpy of Fusion (kJ/mole)

2.82

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

344.0

3^rd Ionization Energy (eV)

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

0.13