|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
colorless gas
|
|
gptkbp:atomicNumber
|
36
|
|
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, 101.325 kPa)
|
|
gptkbp:discoveredBy
|
gptkb:Morris_Travers
gptkb:William_Ramsay
|
|
gptkbp:discoveredIn
|
1898
|
|
gptkbp:electronConfiguration
|
[Ar] 3d10 4s2 4p6
|
|
gptkbp:electronegativity
|
3.00 (Pauling scale)
|
|
gptkbp:foundIn
|
gptkb:United_Kingdom
gptkb:Earth's_atmosphere
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Kr
|
|
gptkbp:isotopes
|
gptkb:Kr-78
gptkb:Kr-80
gptkb:Kr-82
gptkb:Kr-83
gptkb:Kr-84
gptkb:Kr-86
|
|
gptkbp:meltingPoint
|
115.78 K
|
|
gptkbp:molecularWeight
|
83.798 g/mol
|
|
gptkbp:namedAfter
|
the Greek word 'kryptos' meaning 'hidden'
|
|
gptkbp:oxidationStates
|
+1
+2
0
+6
+4
|
|
gptkbp:period
|
4
|
|
gptkbp:phaseAtSTP
|
gptkb:gasoline
|
|
gptkbp:primaryUse
|
lighting
nuclear medicine
photography
|
|
gptkbp:proportionInAtmosphere
|
about 1 ppm by volume
|
|
gptkbp:radioactive
|
gptkb:Kr-85
|
|
gptkbp:relatedGroup
|
18
|
|
gptkbp:riskFactor
|
generally non-toxic
|
|
gptkbp:standardState
|
gptkb:gasoline
|
|
gptkbp:symbol
|
gptkb:Krypton
|
|
gptkbp:UNNumber
|
1056
|
|
gptkbp:uses
|
fill gas in fluorescent lamps
used in high-performance light bulbs
used in some photographic flashes
used in some types of lasers
|
|
gptkbp:bfsParent
|
gptkb:krypton
|
|
gptkbp:bfsLayer
|
5
|