Krypton
36
Kr
Gruppe
18
Periode
4
Blok
p
Protoner
Elektroner
Neutroner
36
36
48
Generelle Egenskaber
Atomnummer
36
Atommasse
83,798
Masseantal
84
Kategori
Ædelgasser
Farve
Farveløs
Radioaktiv
Nej
From the Greek word kryptos, hidden
Krystalstruktur
Fladecentreret Kubisk
Historie
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.
Elektroner i hver skal
2, 8, 18, 8
Elektronkonfiguration
[Ar] 3d10 4s2 4p6
When ionized, krypton gas emits bright white light
Fysiske Egenskaber
Tilstandsform
Gas
Massefylde
0,003733 g/cm3
Smeltepunkt
115,79 K | -157,36 °C | -251,25 °F
Kogepunkt
119,93 K | -153,22 °C | -243,8 °F
Smeltevarme
1,64 kJ/mol
Fordampningsvarme
9,02 kJ/mol
Varmefylde
0,248 J/g·K
Forekomst i jordskorpen
1,5×10-8%
Forekomst i universet
4×10-6%
CAS-nummer
7439-90-9
PubChem CID-nummer
5416
Atomare egenskaber
Atomradius
88 pm
Kovalent radius
116 pm
Elektronegativitet
3,00 (Paulings skala)
Ioniseringspotentiale
13,9996 eV
Atomvolumen
38,9 cm3/mol
Varmeledningsevne
0,0000949 W/cm·K
Oxidationstrin
2
Anvendelser
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
Isotoper
Stabile isotoper
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86KrUstabile isotoper
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