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K   -   Potassium (19/39.098)

Material List
  • Naturally occurring isotopes: 39 41 40
  • Density: 0.862 (293.15K) g/cm3
  • Melting point: 63.25 oC
  • Boiling point: 759.9 oC
  • Latent heat of fusion: 59.33 J/g
  • Specific heat: 0.757 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 8.30E-05 cm/cm/K (at room temp.)
  • Thermal conductivity: 1.03E+00 W/cm/K (at room temp.)
  • Electrical resistivity: 7.20E-06 hm-cm (at room temp.)
  • lonization potential (1st): 4.341 eV
  • Electronic work function Φ: 2.3
  • Oxidation potentials: K → K+ + e = 2.925 V
  • Chemical valence: 1
  • Electrochemical equivalents: 1.4587 g/amp-hr
  • lonic radius: 1.38 angstrom
  • Valence electron potential: 10.4 -eV
  • Principal quantum number: 4
  • Principal electron shells: K L M N
  • Electronic configuration: 1s2 2s2 2p6 3s2 3p6 4s1
  • Valence electrons: 4s1
  • Crystal form: BCC
  • Half life:
  • Cross section σ: 2.1 barns
  • Vapor pressure: 1.06E-04 Pa (at melting point)