mendelevium

E47604

Mendelevium is a synthetic, radioactive actinide element with atomic number 101, named after Dmitri Mendeleev and produced only in particle accelerators.

AI illustration

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AI-generated illustration of mendelevium

This AI-generated illustration was produced by black-forest-labs/FLUX.2-dev (1024x1024) from a prompt written by openai/gpt-oss-120b from the entity's label + description.

Prompt

Generate an image of a mendelevium (Mendelevium is a synthetic, radioactive actinide element with atomic number 101, named after Dmitri Mendeleev and produced only in particle accelerators.)

All labels observed (2)

Label Occurrences
mendelevium canonical 6
element mendelevium 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf actinide
chemical element
radioactive element
synthetic element
atomicNumber 101
atomicRadiusPm around 173
belongsToSeries transuranium elements
block f-block
CASNumber 7440-11-1
chemicalSymbol Md
discoveredAt Lawrence Berkeley National Laboratory
discoveredInCountry United States
discoverer Albert Ghiorso
Bernard G. Harvey
Glenn T. Seaborg
Gregory R. Choppin
Stanley G. Thompson
discoveryYear 1955
electronConfiguration [Rn] 5f13 7s2
elementCategory actinide
firstSynthesisReactionType alpha-particle bombardment
firstSynthesisTarget einsteinium-253
group actinide series
hasNoStableIsotopes yes
isotopesCountKnown more than 15 isotopes
isTransuranic yes
IUPACName mendelevium
meltingPointCelsius about 827
meltingPointKelvin 1100
mostStableIsotope mendelevium-258
mostStableIsotopeHalfLife about 51.5 days
namedAfter Dmitri Mendeleev
namedForContribution periodic table development
occursNaturally no
oxidationState +2
+3
period 7
phaseAtSTP solid
positionInPeriodicTable between fermium and nobelium
primaryOxidationStateInSolution +3
producedBy particle accelerators
radioactive yes
secondaryOxidationStateInSolution +2
standardAtomicWeight [258]
symbolOrigin derived from name mendelevium
syntheticProductionMethod heavy-ion bombardment
Z 101

How these facts were elicited

Referenced by (7)

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

Glenn T. Seaborg discovered mendelevium
mendelevium IUPACName mendelevium
Dmitri Mendeleev hasHonorificEponym element mendelevium
linked to: mendelevium
Stanley G. Thompson coDiscovered mendelevium
Bernard G. Harvey co-discovered mendelevium