Kripton

36
Kr
Skupina
18
Perioda
4
Blok
p
Protons
Electrons
Neutrons
36
36
48
General Properties
Vrstno število
36
Atomska teža
83,798
Mass Number
84
Kategorija
Žlahtni plini
Barva
Brezbarven
Radioactive
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.
Electrons per shell
2, 8, 18, 8
Razporeditev elektronov
[Ar] 3d10 4s2 4p6
Kr
When ionized, krypton gas emits bright white light
Physical Properties
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
Abundance in Earth's crust
1,5×10-8%
Abundance in Universe
4×10-6%
Vial
Zasluge za slike: Images-of-elements
Vial of glowing ultrapure krypton
CAS Number
7439-90-9
PubChem CID Number
5416
Atomic Properties
Atomski polmer
88 pm
Kovalentni polmer
116 pm
Elektronegativnost
3,00 (Paulingova lestvica)
Ionization Potential
13,9996 eV
Atomic Volume
38,9 cm3/mol
Toplotna prevodnost
0,0000949 W/cm·K
Oksidacijska stanja
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 is considered to be non-toxic
Isotopes
Stable Isotopes
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86Kr
Unstable 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