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HOME > Protocols > Reference Material > Periodic Table > Potassium
Potassium

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: 64oC

Boiling Point: 774oC

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

Previous: Atomic Number 18 - Argon


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