argon

URI: https://gptkb.org/entity/argon

GPTKB entity

AI-created image

Statements (58)

Predicate	Object
gptkbp:instanceOf	gptkb:chemical_compound
gptkbp:abundanceInAtmosphere	0.934%
gptkbp:appearance	colorless gas
gptkbp:aroma	odorless
gptkbp:atomicNumber	18
gptkbp:atomicRadius	71 pm
gptkbp:boilingPoint	−185.848 °C
gptkbp:CASNumber	7440-37-1
gptkbp:category	nonmetal
gptkbp:color	colorless
gptkbp:criticalFor	150.687 K, 4.863 MPa
gptkbp:crystalSystem	face-centered cubic
gptkbp:density	1.784 g/L (at 0 °C, 1 atm)
gptkbp:discoveredBy	gptkb:Lord_Rayleigh gptkb:William_Ramsay
gptkbp:discoveredIn	1894
gptkbp:electronConfiguration	[Ne] 3s2 3p6
gptkbp:electronegativity	not applicable
gptkbp:firstIsolatedFrom	gptkb:Lord_Rayleigh gptkb:William_Ramsay
gptkbp:flammability	non-flammable
gptkbp:frequency	visible and ultraviolet
gptkbp:heatOfFusion	1.18 kJ/mol
https://www.w3.org/2000/01/rdf-schema#label	argon
gptkbp:isotopes	gptkb:36Ar gptkb:38Ar gptkb:40Ar
gptkbp:magneticOrdering	diamagnetic
gptkbp:massNumber	39.948 u
gptkbp:meltingPoint	−189.34 °C
gptkbp:molarHeatCapacity	20.85 J/(mol·K)
gptkbp:nameOrigin	Greek 'argos', meaning inactive
gptkbp:oxidationNumber	0
gptkbp:oxidationStates	0
gptkbp:period	3
gptkbp:positionInPeriodicTable	group 18 period 3
gptkbp:radioactive	gptkb:37Ar gptkb:39Ar
gptkbp:refractiveIndex	1.000281 (gas, 0 °C)
gptkbp:relatedGroup	noble gas
gptkbp:solubility	slightly soluble
gptkbp:source	fractional distillation of liquid air
gptkbp:standardState	gptkb:gasoline
gptkbp:stateAtRoomTemperature	gptkb:gasoline
gptkbp:symbol	gptkb:Ar
gptkbp:thermalConductivity	0.01772 W/(m·K)
gptkbp:thermalExpansion	0.00369 K−1 (at 273 K)
gptkbp:toxicity	non-toxic
gptkbp:triplePoint	83.8058 K, 68.89 kPa
gptkbp:uses	filling incandescent and fluorescent light bulbs inert gas for chemical reactions shielding gas in welding
gptkbp:vanDerWaalsRadius	188 pm
gptkbp:vaporPressure	6.43 kJ/mol
gptkbp:bfsParent	gptkb:Earth gptkb:Sir_William_Ramsay
gptkbp:bfsLayer	4