Krypton
36
Kr
Gruppe
18
Periode
4
Block
p
Protonen
Elektronen
Neutronen
36
36
48
Generelle Eigenschaften
Ordnungszahl
36
Atommasse
83,798
Massenzahl
84
Kategorie
Edelgase
Farbe
Farblos
Radioaktiv
Nein
Aus dem Griechischen kryptos (versteckt)
Kristallstruktur
Kubisch flächenzentriert
Geschichte
Scottish chemist Sir William Ramsay and his assistant English chemist Morris Travers discovered krypton in 1898 in London.
They found krypton in the residue left from evaporating nearly all components of liquid air.
William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton.
They found krypton in the residue left from evaporating nearly all components of liquid air.
William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton.
Elektronen pro Schale
2, 8, 18, 8
Elektronenkonfiguration
[Ar] 3d10 4s2 4p6
When ionized, krypton gas emits bright white light
Physikalische Eigenschaften
Aggregatzustand
Gasförmig
Dichte
0,003733 g/cm3
Schmelzpunkt
115,79 K | -157,36 °C | -251,25 °F
Siedepunkt
119,93 K | -153,22 °C | -243,8 °F
Schmelzwärme
1,64 kJ/mol
Verdampfungswärme
9,02 kJ/mol
Spezifische Wärmekapazität
0,248 J/g·K
Häufigkeit in der Erdkruste
1,5×10-8%
Häufigkeit im Universum
4×10-6%
CAS-Nummer
7439-90-9
PubChem CID-Nummer
5416
Atomeigenschaften
Atomradius
88 pm
Kovalenter Radius
116 pm
Elektronegativität
3,00 (Pauling-Skala)
Ionisierungsenergie
13,9996 eV
Molares Volumen
38,9 cm3/mol
Wärmeleitfähigkeit
0,0000949 W/cm·K
Oxidationszustände
2
Anwendung
Krypton is used in certain photographic flash lamps for high-speed photography.
Krypton-83 has application in magnetic resonance imaging (MRI) for imaging airways.
Krypton is used as a filling gas for energy-saving fluorescent lights and as an inert filling gas in incandescent bulbs.
Krypton-83 has application in magnetic resonance imaging (MRI) for imaging airways.
Krypton is used as a filling gas for energy-saving fluorescent lights and as an inert filling gas in incandescent bulbs.
Krypton is considered to be non-toxic
Isotope
Stabile Isotope
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86KrInstabile Isotope
69Kr, 70Kr, 71Kr, 72Kr, 73Kr, 74Kr, 75Kr, 76Kr, 77Kr, 79Kr, 81Kr, 85Kr, 87Kr, 88Kr, 89Kr, 90Kr, 91Kr, 92Kr, 93Kr, 94Kr, 95Kr, 96Kr, 97Kr, 98Kr, 99Kr, 100Kr, 101Kr