Periodic table of elements

19 - Potassium [K]

19: Potassium - Kalium [K]
Group: 1
Period: 4
Atomic number: 19
Atomic mass: 39.0983
Configuration: [Ar] 4s1
Atomic radius: 243 pm
Covalent radius: 203 pm
Electron affinity: 48.4 eV
Ionization energy: 4.3407 eV
Electronic term: 2S1/2
Mass fraction in the earth crust: 0.015
Mass fraction in the earth space: 0.000003
Electronegativity: 0.82

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