Krypton
36
Kr
Gruppe
18
Periode
4
Blokk
p
Protons
Electrons
Neutrons
36
36
48
Generelle eigenskapar
Atomnummer
36
Atommasse
83,798
Mass Number
84
Kategori
Edelgassar
Farge
Fargelaus
Radioactive
Nei
From the Greek word kryptos, hidden
Krystallstruktur
Face Centered Cubic
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.
Elektron per energinivå
2, 8, 18, 8
Elektronkonfigurasjon
[Ar] 3d10 4s2 4p6
When ionized, krypton gas emits bright white light
Fysiske eigenskapar
Tilstandsform
Gass
Tettleik
0,003733 g/cm3
Smeltepunkt
115,79 K | -157,36 °C | -251,25 °F
Kokepunkt
119,93 K | -153,22 °C | -243,8 °F
Smeltevarme
1,64 kJ/mol
Fordampingsvarme
9,02 kJ/mol
Spesifikk varmekapasitet
0,248 J/g·K
Abundance in Earth's crust
1,5×10-8%
Abundance in Universe
4×10-6%
CAS Number
7439-90-9
PubChem CID Number
5416
Atom eigenskapar
Atomradius
88 pm
Kovalent radius
116 pm
Elektronegativitet
3,00 (Paulings skala)
Ioniseringspotensial
13,9996 eV
Molart volum
38,9 cm3/mol
Termisk konduktivitet
0,0000949 W/cm·K
Oksidasjonstrinn
2
Applications
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
Isotopes
Stable Isotopes
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86KrUnstable Isotopes
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