Template:Infobox krypton

Krypton, ₃₆Kr

File:Krypton discharge tube.jpg A krypton-filled discharge tube glowing white
Krypton
Pronunciation	/ˈkrɪptɒn/ ​(KRIP-ton)
Appearance	colorless gas, exhibiting a whitish glow in an electric field
Standard atomic weight Ar°(Kr)
	83.798±0.002 83.798±0.002 (abridged)
Krypton in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Ar ↑ Kr ↓ Xe bromine ← krypton → rubidium
Atomic number (Z)	36
Group	group 18 (noble gases)
Period	period 4
Block	p-block
Electron configuration	[Ar] 3d10 4s2 4p6
Electrons per shell	2, 8, 18, 8
Physical properties
Phase at STP	gas
Melting point	115.78 K ​(−157.37 °C, ​−251.27 °F)
Boiling point	119.93 K ​(−153.415 °C, ​−244.147 °F)
Density (at STP)	3.749 g/L
when liquid (at b.p.)	2.413 g/cm3
Triple point	115.775 K, ​73.53 kPa
Critical point	209.48 K, 5.525 MPa
Heat of fusion	1.64 kJ/mol
Heat of vaporization	9.08 kJ/mol
Molar heat capacity	20.95 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 59 65 74 84 99 120
Atomic properties
Oxidation states	common: +2 +1,?
Electronegativity	Pauling scale: 3.00
Ionization energies	1st: 1350.8 kJ/mol 2nd: 2350.4 kJ/mol 3rd: 3565 kJ/mol
Covalent radius	116±4 pm
Van der Waals radius	202 pm
Color lines in a spectral range Spectral lines of krypton
Other properties
Natural occurrence	primordial
Crystal structure	​face-centered cubic (fcc) (cF4)
Lattice constant	Face-centered cubic crystal structure for krypton a = 583.57 pm (at triple point: 115.78 K)
Thermal conductivity	9.43×10−3  W/(m⋅K)
Magnetic ordering	diamagnetic
Molar magnetic susceptibility	−28.8×10−6 cm3/mol (298 K)
Speed of sound	(gas, 20 °C) 221 m·s−1 (liquid) 1120 m/s
CAS Number	7439-90-9
History
Discovery and first isolation	William Ramsay and Morris Travers (1898)
Isotopes of krypton
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 78Kr 0.360% 9.2×1021 y εε 78Se 79Kr synth 35 h ε 79Br β+ 79Br γ – 80Kr 2.29% stable 81Kr trace 2.3×105 y ε 81Br 81mKr synth 13.10 s IT 81Kr ε 81Br 82Kr 11.6% stable 83Kr 11.5% stable 84Kr 57.0% stable 85Kr trace 11 y β− 85Rb 86Kr 17.3% stable

Kr · Krypton
Br ← ibox Br	iso 36 Kr  [] IB-Kr [] IBisos []	→ Rb ibox Rb
File:Symbol category class.svg cat:Kr (0) File:Symbol category class.svg cat:Kr-isotopes (0) File:Commons-logo.svg Commons File:Wikidata-logo.svg Wikidata:Q888 File:Wiktionary-logo.svg Wiktionary
indexes by PT (page)

child table, as reused in {IB-Kr}
Main isotopes of krypton
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 78Kr 0.360% 9.2×1021 y εε 78Se 79Kr synth 35 h ε 79Br β+ 79Br γ – 80Kr 2.29% stable 81Kr trace 2.3×105 y ε 81Br 81mKr synth 13.10 s IT 81Kr ε 81Br 82Kr 11.6% stable 83Kr 11.5% stable 84Kr 57.0% stable 85Kr trace 11 y β− 85Rb 86Kr 17.3% stable

Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt)	caption: alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
most stable isotope
File:Notification-icon-Wikidata-logo.svg Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (0) · (this table: )

References

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