Atomic Number: 37

Name: Rubidium

Symbol: Rb

Atomic Weight: 85.4678

Electron affinity: -47 kJ/mol

Electron configuration: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s¹

Ionization energies: 403 kJ/mol; 2,632 kJ/mol

Pauling electronegativity: 0.8

Melting Point: 39^oC

Boiling Point: 688^oC

Density: 1.53 g/cm³

Standard potential (volts), M⁺ + e^- ---> M: -2.92

Covalent radius: 2.16 angstroms

Ionic radius: 1.66 angstroms (+1)

Common oxidation states in compounds: +1