Fermium

E88968
actinide chemical element radioactive metal synthetic element

Fermium is a synthetic, highly radioactive actinide metal with atomic number 100, first identified in the debris of the first hydrogen bomb test and named in honor of physicist Enrico Fermi.

Jump to: Surface forms Statements Referenced by

Observed surface forms (1)

Surface form Occurrences
fermium 1

Statements (48)

Predicate Object
instanceOf actinide ⓘ
chemical element ⓘ
radioactive metal ⓘ
synthetic element ⓘ
belongsToBlock f-block ⓘ
belongsToPeriod period 7 ⓘ
belongsToSeries actinide series ⓘ
hasAtomicNumber 100 ⓘ
hasAtomicRadiusEstimate approximately 2.45 Å (metallic) ⓘ
hasCASNumber 7440-72-4 ⓘ
hasCommonOxidationState +3 ⓘ
hasDiscoveryLocation Enewetak Atoll ⓘ
surface form: Enewetak Atoll (test site debris source)
hasElectronConfiguration [Rn] 5f12 7s2 ⓘ
hasIsotope fermium-252 ⓘ
fermium-253 ⓘ
fermium-255 ⓘ
fermium-257 ⓘ
hasMostStableIsotope fermium-257 ⓘ
hasMostStableIsotopeHalfLife about 100.5 days ⓘ
hasNameOrigin Enrico Fermi ⓘ
hasNuclearCharge +100 ⓘ
hasOxidationState +2 ⓘ
+3 ⓘ
hasPhaseAtSTP solid ⓘ
hasPositionInPeriodicTable between einsteinium and mendelevium ⓘ
hasPrimaryUse scientific research ⓘ
hasProtons 100 ⓘ
hasStandardAtomicWeight [257] ⓘ
hasSymbol Fm ⓘ
isHeavierThan einsteinium ⓘ
isHighlyRadioactive true ⓘ
isLighterThan mendelevium ⓘ
isMetal true ⓘ
isNaturallyOccurring false ⓘ
isPostUraniumElement true ⓘ
isProducedBy multiple neutron capture in uranium or plutonium in nuclear explosions ⓘ
neutron capture in heavy actinides ⓘ
isProducedIn nuclear reactors ⓘ
thermonuclear explosions ⓘ
isSynthetic true ⓘ
isTransuraniumElement true ⓘ
namedAfter Enrico Fermi ⓘ
wasDiscoveredAt Lawrence Berkeley National Laboratory ⓘ
wasDiscoveredBy Albert Ghiorso ⓘ
University of California, Berkeley ⓘ
surface form: Berkeley team at University of California
wasDiscoveredDuring first hydrogen bomb test analysis ⓘ
wasDiscoveredIn 1952 ⓘ
wasFirstIdentifiedIn Ivy Mike thermonuclear test debris ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Glenn T. Seaborg → discovered → Fermium ⓘ
this entity surface form: fermium
Enrico Fermi → hasEponym → Fermium ⓘ