berkelium
E909379
Berkelium is a synthetic, radioactive metallic element in the actinide series, first produced in 1949 and used mainly for scientific research.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Berkelium | 0 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
actinide
ⓘ
chemical element ⓘ radioactive element ⓘ synthetic element ⓘ |
| appearance | silvery metal ⓘ |
| atomicNumber | 97 ⓘ |
| atomicRadiusPm | 170 ⓘ |
| belongsToSeries | transuranium elements ⓘ |
| blockInPeriodicTable | f-block ⓘ |
| boilingPointKelvin | 2900 ⓘ |
| CASNumber | 7440-40-6 ⓘ |
| chemicalSymbol | Bk NERFINISHED ⓘ |
| commonOxidationState | +3 ⓘ |
| covalentRadiusPm | 96 ⓘ |
| crystalStructure | double-hexagonal close-packed ⓘ |
| densityAtRoomTemperature | 14.78 g/cm³ ⓘ |
| discoveredAt | University of California, Berkeley NERFINISHED ⓘ |
| discoveredInCountry | United States NERFINISHED ⓘ |
| discoverer |
Albert Ghiorso
NERFINISHED
ⓘ
Glenn T. Seaborg NERFINISHED ⓘ Kenneth Street Jr. NERFINISHED ⓘ Stanley G. Thompson NERFINISHED ⓘ |
| discoveryMethod | neutron bombardment of americium-241 ⓘ |
| discoveryYear | 1949 ⓘ |
| electronicConfiguration | [Rn] 5f9 7s2 ⓘ |
| elementCategory | actinide ⓘ |
| groupInPeriodicTable | actinides NERFINISHED ⓘ |
| hasIsotope |
berkelium-247
NERFINISHED
ⓘ
berkelium-249 NERFINISHED ⓘ berkelium-250 NERFINISHED ⓘ berkelium-251 NERFINISHED ⓘ |
| isPartOf | actinide series NERFINISHED ⓘ |
| isTransuranic | true ⓘ |
| meltingPointKelvin | 1259 ⓘ |
| mostStableIsotope | berkelium-247 NERFINISHED ⓘ |
| mostStableIsotopeHalfLife | 1.38e3 years ⓘ |
| namedAfter | Berkeley, California NERFINISHED ⓘ |
| naturalOccurrence | synthetic ⓘ |
| oxidationState |
+3
ⓘ
+4 ⓘ |
| periodInPeriodicTable | 7 ⓘ |
| primaryUse | scientific research ⓘ |
| productionMethod |
neutron irradiation of americium
ⓘ
neutron irradiation of curium ⓘ |
| radioactivity | radioactive ⓘ |
| standardAtomicWeight | [247] ⓘ |
| standardState | solid ⓘ |
| uses | target material for synthesis of heavier transuranium elements ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.