Atomic Number (# of protons)

31

Mass (amu)

69.72

Density

5.90 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Ar]3d¹⁰4s²p¹

Oxidation States (bold = most stable)

+3

Atomic Radius (pm)

122

Ionic Radius (pm)

(+3)62

Electronegativity

1.8

Melting Point (⁰C, 1 atm)

30

Electron Affinity (eV)

0.3

Boiling Point(⁰C, 1 atm)

2205

1^st Ionization energy (eV)

5.10

Enthalpy of Fusion (kJ/mole)

5.59

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

256.1

3^rd Ionization Energy (eV)

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

0.37