|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
silvery
|
|
gptkbp:atomicNumber
|
97
|
|
gptkbp:atomicRadius
|
170 pm
|
|
gptkbp:atomicWeight
|
247
|
|
gptkbp:block
|
f-block
|
|
gptkbp:boilingPoint
|
2627 °C
|
|
gptkbp:CASNumber
|
7440-40-6
|
|
gptkbp:category
|
actinide
|
|
gptkbp:compounds
|
gptkb:berkelium(III)_chloride
gptkb:berkelium(III)_fluoride
gptkb:berkelium(III)_nitrate
gptkb:berkelium(III)_oxide
gptkb:berkelium(IV)_oxide
|
|
gptkbp:crystalSystem
|
double hexagonal close-packed
|
|
gptkbp:density
|
14.78 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Albert_Ghiorso
gptkb:Glenn_T._Seaborg
gptkb:Stanley_G._Thompson
gptkb:Kenneth_Street,_Jr.
|
|
gptkbp:discoveredIn
|
1949
|
|
gptkbp:electronConfiguration
|
[Rn] 5f9 7s2
|
|
gptkbp:electronegativity
|
1.3 (Pauling scale)
|
|
gptkbp:firstIonizationEnergy
|
601 kJ/mol
|
|
gptkbp:foundIn
|
gptkb:United_States
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
berkelium
|
|
gptkbp:isomerOf
|
gptkb:berkelium-247
gptkb:berkelium-250
berkelium-249
|
|
gptkbp:magneticOrdering
|
paramagnetic
|
|
gptkbp:mainProductionMethod
|
neutron bombardment of americium or plutonium
|
|
gptkbp:meltingPoint
|
986 °C
|
|
gptkbp:molarVolume
|
17.99 cm³/mol
|
|
gptkbp:mostStableIsotope
|
gptkb:berkelium-247
|
|
gptkbp:namedAfter
|
gptkb:Berkeley,_California
|
|
gptkbp:naturalOccurrence
|
synthetic
|
|
gptkbp:notableFor
|
no significant biological role
rarely produced in macroscopic quantities
|
|
gptkbp:oxidationStates
|
+3
+4
|
|
gptkbp:period
|
7
|
|
gptkbp:phaseAtSTP
|
gptkb:stone
|
|
gptkbp:positionInPeriodicTable
|
period 7, group 3, f-block
|
|
gptkbp:radioactive
|
true
|
|
gptkbp:relatedGroup
|
actinide
|
|
gptkbp:riskFactor
|
radioactive toxicity
|
|
gptkbp:symbol
|
gptkb:Bk
|
|
gptkbp:uses
|
scientific research
|
|
gptkbp:bfsParent
|
gptkb:Glenn_Seaborg
gptkb:Glenn_T._Seaborg
|
|
gptkbp:bfsLayer
|
4
|