berkelium

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

GPTKB entity

AI-created image

Statements (51)

Predicate	Object
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	gptkb: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
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	gptkb:actinide
gptkbp:riskFactor	radioactive toxicity
gptkbp:symbol	gptkb:Bk
gptkbp:uses	gptkb:scientific_research
gptkbp:bfsParent	gptkb:Glenn_Seaborg gptkb:Glenn_T._Seaborg
gptkbp:bfsLayer	4
https://www.w3.org/2000/01/rdf-schema#label	berkelium