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Krypton  SEE PERIODIC TABLE
see article  SEE FULL ARTICLE


Atomic Number36

Atomic SymbolKr

Atomic Weight83.80 amu

GroupNoble Gas, 18

FormGas

Density @ STP3.677 g/L

Melting Point-157.36 °C (-251.248 °F, 115.79 °K)

Boiling Point-153.22 °C (-243.796 °F, 119.93 °K)

Heat of Fusion1.37 kJ/mol

Heat of Vaporization9.08 kJ/mol

First Ionization Potential13.99961 eV

Specific Heat Capacity0.248 J/g K

Ground State Electron Configuration4p6

Oxidation State(s)0

Stable Isotopes and Natural Abundance on Earth78Kr, 0.35%; 80Kr, 2.25%; 82Kr, 11.61%; 83Kr, 11.5%; 84Kr, 57.0%; 86Kr, 17.3%

Selected Radioisotopes81Kr

Atomic Radius88 pm

Crystal StructureCubic

Discovered byRamsay; Travers, 1898

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