dubnium
E909428
Dubnium is a synthetic, highly radioactive transactinide chemical element with atomic number 105, named after the Russian research town of Dubna where it was first studied.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
chemical element
ⓘ
superheavy element ⓘ synthetic element ⓘ transactinide element ⓘ |
| atomicNumber | 105 ⓘ |
| blockInPeriodicTable | d-block ⓘ |
| CASNumber | 53850-35-4 ⓘ |
| categoryInPeriodicTable | transition metal ⓘ |
| chemicalSeries | group 5 elements ⓘ |
| countryOfDiscovery | Soviet Union NERFINISHED ⓘ |
| discoveredAt | Dubna NERFINISHED ⓘ |
| discoveryControversy | subject of naming dispute between US and Soviet teams ⓘ |
| discoveryMethod | heavy-ion nuclear reactions ⓘ |
| discoveryYear | 1960s ⓘ |
| formerProposedName | hahnium ⓘ |
| formerSystematicName | unnilpentium NERFINISHED ⓘ |
| groupInPeriodicTable | 5 ⓘ |
| hasIsotope |
dubnium-255
NERFINISHED
ⓘ
dubnium-256 NERFINISHED ⓘ dubnium-257 NERFINISHED ⓘ dubnium-258 ⓘ dubnium-260 NERFINISHED ⓘ dubnium-261 NERFINISHED ⓘ dubnium-262 ⓘ dubnium-263 NERFINISHED ⓘ dubnium-266 ⓘ dubnium-268 NERFINISHED ⓘ |
| hazard | radioactive health hazard ⓘ |
| IUPACName | dubnium NERFINISHED ⓘ |
| mostStableIsotope | dubnium-268 NERFINISHED ⓘ |
| mostStableIsotopeHalfLife | about 28 hours ⓘ |
| name | dubnium NERFINISHED ⓘ |
| namedAfter |
Dubna
NERFINISHED
ⓘ
Joint Institute for Nuclear Research NERFINISHED ⓘ |
| occurrence |
does not occur naturally
ⓘ
produced artificially ⓘ |
| periodInPeriodicTable | 7 ⓘ |
| phaseAtSTP | solid (predicted) ⓘ |
| predictedChemicalBehavior |
similar to niobium
ⓘ
similar to tantalum ⓘ |
| predictedElectronConfiguration | [Rn] 5f14 6d3 7s2 ⓘ |
| radioactivity | highly radioactive ⓘ |
| recognizedBy | IUPAC NERFINISHED ⓘ |
| seriesInPeriodicTable | transactinide series NERFINISHED ⓘ |
| stability | no stable isotopes ⓘ |
| standardAtomicWeight | [268] ⓘ |
| symbol | Db ⓘ |
| uses | scientific research only ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.