nobelium
E48435
Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
All labels observed (2)
| Label | Occurrences |
|---|---|
| nobelium canonical | 4 |
| Nobelium-259 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T373547 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: nobelium Context triple: [Lawrence Berkeley National Laboratory, discovered, nobelium]
-
A.
mendelevium
Mendelevium is a synthetic, radioactive actinide element with atomic number 101, named after Dmitri Mendeleev and produced only in particle accelerators.
-
B.
Samnium
Samnium was an ancient region of south-central Italy inhabited by the Samnites, an Oscan-speaking Italic people known for their wars with the Roman Republic.
-
C.
Glenn T. Seaborg
Glenn T. Seaborg was an American chemist and Nobel laureate renowned for his work on the discovery of numerous transuranium elements and his leadership in the development of the actinide concept.
-
D.
Boric
Boric is the surname of Gabriel Boric, the Chilean politician who became one of the world’s youngest heads of state when he was elected President of Chile.
-
E.
Andriette Nobel
Andriette Nobel was the mother of Alfred Nobel, the Swedish inventor, engineer, and founder of the Nobel Prizes.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: nobelium Target entity description: Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
-
A.
mendelevium
Mendelevium is a synthetic, radioactive actinide element with atomic number 101, named after Dmitri Mendeleev and produced only in particle accelerators.
-
B.
Samnium
Samnium was an ancient region of south-central Italy inhabited by the Samnites, an Oscan-speaking Italic people known for their wars with the Roman Republic.
-
C.
Glenn T. Seaborg
Glenn T. Seaborg was an American chemist and Nobel laureate renowned for his work on the discovery of numerous transuranium elements and his leadership in the development of the actinide concept.
-
D.
Boric
Boric is the surname of Gabriel Boric, the Chilean politician who became one of the world’s youngest heads of state when he was elected President of Chile.
-
E.
Andriette Nobel
Andriette Nobel was the mother of Alfred Nobel, the Swedish inventor, engineer, and founder of the Nobel Prizes.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
actinide
ⓘ
chemical element ⓘ synthetic element ⓘ |
| atomicNumber | 102 ⓘ |
| belongsTo | periodic table of the elements ⓘ |
| block | f-block ⓘ |
| boilingPoint | unknown (not well established) ⓘ |
| CASNumber | 10028-14-5 ⓘ |
| chemicalSeries | transuranium element ⓘ |
| commonIsotope |
Nobelium-252
ⓘ
Nobelium-254 ⓘ Nobelium-255 ⓘ Nobelium-257 ⓘ |
| discoveringInstitution |
Joint Institute for Nuclear Research
ⓘ
Lawrence Berkeley National Laboratory ⓘ |
| discoveryYear |
1957
ⓘ
1958 ⓘ |
| electronConfiguration | [Rn] 5f13 7s2 (ground state, expected) ⓘ |
| elementCategory | actinide series ⓘ |
| group | none ⓘ |
| isotopesCountObserved | more than 10 ⓘ |
| isTransuranic | true ⓘ |
| IUPACName | nobelium self-linksurface differs ⓘ |
| meltingPoint | about 1100 K (estimated) ⓘ |
| mostStableIsotope |
nobelium
self-linksurface differs
ⓘ
surface form:
Nobelium-259
|
| mostStableIsotopeHalfLife | about 58 minutes ⓘ |
| namedAfter | Alfred Nobel ⓘ |
| nameOrigin | Alfred Nobel ⓘ |
| naturalAbundance | 0 ⓘ |
| neutronNumberInMostStableIsotope | 157 ⓘ |
| occurrence | does not occur naturally ⓘ |
| oxidationState |
+2
ⓘ
+3 ⓘ |
| period | 7 ⓘ |
| phaseAtSTP | solid (predicted) ⓘ |
| positionInPeriodicTable | between Mendelevium and Lawrencium ⓘ |
| predominantOxidationStateInSolution | +2 ⓘ |
| productionMethod | particle accelerator synthesis ⓘ |
| protonCount | 102 ⓘ |
| radioactiveDecayMode |
alpha decay
ⓘ
spontaneous fission ⓘ |
| radioactivity | highly radioactive ⓘ |
| standardAtomicWeight | [259] ⓘ |
| symbol | No ⓘ |
| uses |
nuclear physics research
ⓘ
scientific research ⓘ study of actinide chemistry ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: nobelium Description of subject: Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Nobelium
this entity surface form:
Nobelium-259