|
gptkbp:instance_of
|
gptkb:isotope
|
|
gptkbp:abundance_in_earth's_atmosphere
|
0.0005% by volume
|
|
gptkbp:aroma
|
odorless
|
|
gptkbp:average_temperature
|
gptkb:natural_gas
|
|
gptkbp:chemical_group
|
noble gas
|
|
gptkbp:color
|
colorless
|
|
gptkbp:cooling_system
|
0.1513 W/(m· K)
5.193 J/(g· K)
|
|
gptkbp:discovered_by
|
gptkb:Pierre_Janssen
|
|
gptkbp:discovery_year
|
1868
|
|
gptkbp:dissolved
|
insoluble
|
|
gptkbp:electronegativity
|
1s²
|
|
gptkbp:financial_stability
|
gptkb:true
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
helium-4
|
|
gptkbp:is_a_fusion_of
|
produced in stars
|
|
gptkbp:isotopes
|
gptkb:helium-5
gptkb:helium-6
gptkb:helium-7
gptkb:helium-8
2
helium-3
|
|
gptkbp:mass
|
gptkb:4
|
|
gptkbp:melting_point
|
-268.93 ° C
-272.2 ° C
|
|
gptkbp:occurs_in
|
abundant in the universe
|
|
gptkbp:population_density
|
0.1786 g/ L
|
|
gptkbp:power_source
|
24.587 e V
|
|
gptkbp:radioactive_decay
|
not radioactive
|
|
gptkbp:roll_rate
|
gptkb:0
|
|
gptkbp:species
|
24% by mass
|
|
gptkbp:symbol
|
He
|
|
gptkbp:taste
|
tasteless
|
|
gptkbp:uses
|
gptkb:Dog
cryogenics
in scientific research
coolant in MRI machines
in ballooning
in breathing mixtures for deep-sea diving
in fiber optics
in gas chromatography
in leak detection
in semiconductor manufacturing
in sound production for voice alteration
inert gas for welding
lifting gas
|
|
gptkbp:was_a_response_to
|
produced in Big Bang nucleosynthesis
produced in stellar nucleosynthesis
|
|
gptkbp:bfsParent
|
gptkb:Bose-Einstein_condensate
gptkb:fusion
|
|
gptkbp:bfsLayer
|
4
|