|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:abundanceInUniverse
|
second most abundant element
|
|
gptkbp:appearance
|
colorless gas
|
|
gptkbp:atomicNumber
|
2
|
|
gptkbp:block
|
s-block
|
|
gptkbp:boilingPoint
|
4.22 K
|
|
gptkbp:CASNumber
|
7440-59-7
|
|
gptkbp:crystalSystem
|
hexagonal close-packed
|
|
gptkbp:density
|
0.1786 g/L
|
|
gptkbp:discoveredBy
|
gptkb:Norman_Lockyer
gptkb:Pierre_Janssen
|
|
gptkbp:discoveredIn
|
1868
|
|
gptkbp:electronConfiguration
|
1s2
|
|
gptkbp:firstIonizationEnergy
|
2372.3 kJ/mol
|
|
gptkbp:flammability
|
false
|
|
gptkbp:foundIn
|
natural gas
stars
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Hélio
|
|
gptkbp:isotopes
|
gptkb:He-4
gptkb:He-3
|
|
gptkbp:magneticOrdering
|
diamagnetic
|
|
gptkbp:massNumber
|
4.002602 u
|
|
gptkbp:meltingPoint
|
0.95 K
|
|
gptkbp:namedAfter
|
gptkb:Helios
|
|
gptkbp:nobleGas
|
true
|
|
gptkbp:oxidationStates
|
0
|
|
gptkbp:period
|
1
|
|
gptkbp:phaseAtSTP
|
gptkb:gasoline
|
|
gptkbp:radioactive
|
false
|
|
gptkbp:relatedGroup
|
18
|
|
gptkbp:solubility
|
very low
|
|
gptkbp:standardState
|
gptkb:gasoline
|
|
gptkbp:symbol
|
He
|
|
gptkbp:thermalConductivity
|
0.1513 W/(m·K)
|
|
gptkbp:uses
|
cryogenics
balloons
welding
pressurizing rocket fuel
|
|
gptkbp:yearNamed
|
gptkb:French
|
|
gptkbp:英文名
|
gptkb:Helium
|
|
gptkbp:bfsParent
|
gptkb:Helio
|
|
gptkbp:bfsLayer
|
7
|