Atomic Number (# of protons)

44

Mass (amu)

101.1

Density

12.4 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Kr]4d⁷5s¹

Oxidation States (bold = most stable)

+2.+3,+4,+6,+8

Atomic Radius (pm)

133

Ionic Radius (pm)

(+3)68

Electronegativity

1.4

Melting Point (⁰C, 1 atm)

2334

Electron Affinity (eV)

1.05

Boiling Point(⁰C, 1 atm)

4150

1^st Ionization energy (eV)

7.36

Enthalpy of Fusion (kJ/mole)

25.5

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

567.8

3^rd Ionization Energy (eV)

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

0.24