Atomic Number (# of protons)

87

Mass (amu)

(223)

Density

Not Available

Electron Configuration

[Rn]7s¹

Oxidation States (bold = most stable)

+1

Atomic Radius (pm)

Not Available

Ionic Radius (pm)

Not Available

Electronegativity

0.9

Melting Point (⁰C, 1 atm)

27

Electron Affinity (eV)

0.46

Boiling Point(⁰C, 1 atm)

677

1^st Ionization energy (eV)

Not Available

Enthalpy of Fusion (kJ/mole)

Not Available

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

Not Available

3^rd Ionization Energy (eV)

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

Not Available