Kripton
36
Kr
Skupina
18
Perioda
4
Blok
p
Protoni
Elektroni
Nevtroni
36
36
48
Splošne lastnosti
Vrstno število
36
Atomska teža
83,798
Masno število
84
Kategorija
Žlahtni plini
Barva
Brezbarven
Radioaktivno
Ne
From the Greek word kryptos, hidden
Kristalna struktura
Ploskovno centrirana kubična
Zgodovina
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.
Elektroni po lupinah
2, 8, 18, 8
Razporeditev elektronov
[Ar] 3d10 4s2 4p6
When ionized, krypton gas emits bright white light
Fizikalne lastnosti
Faza snovi
Plin
Gostota
0,003733 g/cm3
Tališče
115,79 K | -157,36 °C | -251,25 °F
Vrelišče
119,93 K | -153,22 °C | -243,8 °F
Talilna toplota
1,64 kJ/mol
Izparilna toplota
9,02 kJ/mol
Toplotna kapaciteta
0,248 J/g·K
Zastopanost v Zemljini skorji
1,5×10-8%
Zastopanost v vesolju
4×10-6%
CAS številka
7439-90-9
PubChem CID številka
5416
Atomske lastnosti
Atomski polmer
88 pm
Kovalentni polmer
116 pm
Elektronegativnost
3,00 (Paulingova lestvica)
Ionizacijski potencial
13,9996 eV
Atomski volumen
38,9 cm3/mol
Toplotna prevodnost
0,0000949 W/cm·K
Oksidacijska stanja
2
Uporabe
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
Izotopi
Stabilni izotopi
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86KrNestabilni izotopi
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