krypton

GPTKB entity

Statements (54)
Predicate Object
gptkbp:instanceOf gptkb:chemical_compound
gptkbp:abundanceInAtmosphere ~1 ppm by volume
gptkbp:appearance colorless gas
gptkbp:atomicNumber 36
gptkbp:atomicRadius 88 pm
gptkbp:atomicWeight 83.798
gptkbp:block p-block
gptkbp:boilingPoint 119.93 K
gptkbp:CASNumber 7439-90-9
gptkbp:category noble gas
gptkbp:crystalSystem face-centered cubic
gptkbp:density 3.749 g/L (at 0°C, 1 atm)
gptkbp:discoveredBy gptkb:Morris_Travers
gptkb:William_Ramsay
gptkbp:discoveredIn 1898
gptkbp:EC_number 231-098-5
gptkbp:electronConfiguration [Ar] 3d10 4s2 4p6
gptkbp:electronegativity 3.00 (Pauling scale)
gptkbp:firstIsolatedFrom gptkb:London,_England
gptkbp:foundIn gptkb:Earth's_atmosphere
https://www.w3.org/2000/01/rdf-schema#label krypton
gptkbp:ionizationEnergy 1350.8 kJ/mol
gptkbp:isotopes gptkb:Kr-78
gptkb:Kr-80
gptkb:Kr-82
gptkb:Kr-83
gptkb:Kr-84
gptkb:Kr-86
gptkbp:magneticOrdering diamagnetic
gptkbp:meltingPoint 115.79 K
gptkbp:molarHeatCapacity 20.95 J/(mol·K)
gptkbp:namedAfter Greek word 'kryptos' meaning 'hidden'
gptkbp:oxidationStates +1
+2
0
+6
+4
gptkbp:period 4
gptkbp:phaseAtSTP gptkb:gasoline
gptkbp:radioactive gptkb:Kr-85
gptkbp:relatedGroup 18
gptkbp:riskFactor asphyxiation in high concentrations
gptkbp:standardState gptkb:gasoline
gptkbp:symbol gptkb:Kr
gptkbp:thermalConductivity 9.43 mW/(m·K)
gptkbp:UNNumber 1056
gptkbp:uses lighting
photography
lasers
high-performance light bulbs
plasma screens
gptkbp:vanDerWaalsRadius 202 pm
gptkbp:bfsParent gptkb:Sir_William_Ramsay
gptkbp:bfsLayer 4