Krypton
36
Kr
Groep
18
Periode
4
Blok
p
Protonen
Elektronen
Neutronen
36
36
48
Algemene Eigenschappen
Atoomnummer
36
Atomair gewicht
83,798
Massa Getal
84
Categorie
Edelgassen
Kleur
Kleurloos
Radioactief
Nee
Van het Griekse woord kryptos, verborgen
Kristalstructuur
Zijvlak-gecentreerde Kubus
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.
Eletronen per schil
2, 8, 18, 8
Electronconfiguratie
[Ar] 3d10 4s2 4p6
When ionized, krypton gas emits bright white light
Fysieke Eigenschappen
Fase
Gas
Dichtheid
0,003733 g/cm3
Smeltpunt
115,79 K | -157,36 °C | -251,25 °F
Kookpunt
119,93 K | -153,22 °C | -243,8 °F
Fusiewarmte
1,64 kJ/mol
Verdampingswarmte
9,02 kJ/mol
Specifieke Warmtecapaciteit
0,248 J/g·K
Overvloedig aanwezig in de aardkorst
1,5×10-8%
Overvloedig aanwezig in het universum
4×10-6%
CAS-nummer
7439-90-9
PubChem CID nummer
5416
Atoomeigenschappen
Atoomstraal
88 pm
Covalentiestraal
116 pm
Electronegativiteit
3,00 (Pauling schaal)
Ionisatiepotentiaal
13,9996 eV
Atoomvolume
38,9 cm3/mol
Thermische geleiding
0,0000949 W/cm·K
Oxidatietoestanden
2
Toepassingen
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
Isotopen
Stabiele isotopen
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86KrInstabiele isotopen
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