|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
silvery
|
|
gptkbp:atomicNumber
|
61
|
|
gptkbp:atomicRadius
|
183 pm
|
|
gptkbp:block
|
f-block
|
|
gptkbp:boilingPoint
|
3273 K
|
|
gptkbp:CASNumber
|
7440-12-2
|
|
gptkbp:category
|
rare earth element
actinide (historically misclassified)
|
|
gptkbp:compatibleWith
|
pure form in nature
|
|
gptkbp:compounds
|
promethium(III) chloride
promethium(III) oxide
|
|
gptkbp:crystalSystem
|
double hexagonal close-packed
|
|
gptkbp:density
|
7.26 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Charles_D._Coryell
Jacob A. Marinsky
Lawrence E. Glendenin
|
|
gptkbp:discoveredIn
|
1945
|
|
gptkbp:electronConfiguration
|
[Xe] 4f5 6s2
|
|
gptkbp:electronegativity
|
1.13 (Pauling scale)
|
|
gptkbp:firstIonizationEnergy
|
540 kJ/mol
|
|
gptkbp:foundIn
|
Earth's crust (very rare)
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Promethium
|
|
gptkbp:isotopes
|
Promethium-145
Promethium-147
|
|
gptkbp:IUPACName
|
promethium
|
|
gptkbp:magneticOrdering
|
paramagnetic
|
|
gptkbp:meltingPoint
|
1315 K
|
|
gptkbp:molecularWeight
|
145 g/mol
|
|
gptkbp:mostStableIsotope
|
Promethium-145
Promethium-147
|
|
gptkbp:namedAfter
|
gptkb:Prometheus
|
|
gptkbp:naturalOccurrence
|
trace amounts in uranium ores
|
|
gptkbp:oxidationStates
|
+3
|
|
gptkbp:period
|
6
|
|
gptkbp:producedBy
|
neutron bombardment of neodymium
uranium fission
|
|
gptkbp:radioactive
|
true
|
|
gptkbp:relatedGroup
|
lanthanide
|
|
gptkbp:riskFactor
|
radioactive hazard
|
|
gptkbp:standardState
|
gptkb:stone
|
|
gptkbp:symbol
|
Pm
|
|
gptkbp:thermalConductivity
|
17.9 W/(m·K)
|
|
gptkbp:uses
|
nuclear batteries
phosphorescent paint
|
|
gptkbp:vanDerWaalsRadius
|
unknown
|
|
gptkbp:bfsParent
|
gptkb:Lanthanide
|
|
gptkbp:bfsLayer
|
6
|