Atomic Number: 19

Name: Potassium

Original name: Kalium

Atomic symbol: K

Atomic Weight: 39.0983

Electron affinity: -48 kJ/mol

Electron configuration: 1s²2s²2p⁶3s²3p⁶4s¹

Ionization energies: 419 kJ/mol; 3,051 kJ/mol

Pauling electronegativity: 0.8

Melting Point: 64^oC

Boiling Point: 774^oC

Density: 0.86 g/cm³

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

Covalent radius: 2.02 angstroms

Ionic radius: 1.52 angstroms (+1)

Common oxidation states in compounds: +1