Atomic Number (# of protons)

49

Mass (amu)

114.8

Density

7.31 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Kr]4d¹⁰5s²p¹

Oxidation States (bold = most stable)

+3

Atomic Radius (pm)

163

Ionic Radius (pm)

(+3)80

Electronegativity

1.5

Melting Point (⁰C, 1 atm)

157

Electron Affinity (eV)

0.30

Boiling Point(⁰C, 1 atm)

2073

1^st Ionization energy (eV)

5.79

Enthalpy of Fusion (kJ/mole)

3.28

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

226.4

3^rd Ionization Energy (eV)

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

0.23