Atomic Number (# of protons)

53

Mass (amu)

126.9

Density

4.92 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Kr]4d¹⁰5s²p⁵

Oxidation States (bold = most stable)

+1,-1,+5,+7

Atomic Radius (pm)

133

Ionic Radius (pm)

(-1)220

Electronegativity

2.2

Melting Point (⁰C, 1 atm)

114

Electron Affinity (eV)

3.06

Boiling Point(⁰C, 1 atm)

184

1^st Ionization energy (eV)

10.45

Enthalpy of Fusion (kJ/mole)

7.76

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

20.88

3^rd Ionization Energy (eV)

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

0.15