curium
E909378
Curium is a synthetic, highly radioactive metallic element in the actinide series, used mainly in scientific research and as a source of alpha particles.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T11164847 — 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: curium Context triple: [actinide series, hasElement, curium]
-
A.
neptunium
Neptunium is a radioactive, synthetic actinide metal and the first transuranium element, used mainly in nuclear research and reactor applications.
-
B.
einsteinium
Einsteinium is a synthetic, highly radioactive actinide element named after Albert Einstein and used mainly for scientific research.
-
C.
nobelium
Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
-
D.
Plutonium (Ploutonion)
Plutonium (Ploutonion) is an ancient Greco-Roman religious sanctuary and cave at Hierapolis, believed to be an entrance to the underworld and associated with the god Pluto/Hades.
-
E.
Fermium
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.
- 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: curium Target entity description: Curium is a synthetic, highly radioactive metallic element in the actinide series, used mainly in scientific research and as a source of alpha particles.
-
A.
neptunium
Neptunium is a radioactive, synthetic actinide metal and the first transuranium element, used mainly in nuclear research and reactor applications.
-
B.
einsteinium
Einsteinium is a synthetic, highly radioactive actinide element named after Albert Einstein and used mainly for scientific research.
-
C.
nobelium
Nobelium is a synthetic, highly radioactive actinide element with atomic number 102, named in honor of Alfred Nobel and used primarily for scientific research.
-
D.
Plutonium (Ploutonion)
Plutonium (Ploutonion) is an ancient Greco-Roman religious sanctuary and cave at Hierapolis, believed to be an entrance to the underworld and associated with the god Pluto/Hades.
-
E.
Fermium
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.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
actinide
ⓘ
chemical element ⓘ radioactive element ⓘ synthetic element ⓘ |
| appearance | silvery metallic solid ⓘ |
| atomicNumber | 96 ⓘ |
| boilingPoint | 3110 °C (approximate) ⓘ |
| CASNumber | 7440-51-9 ⓘ |
| commonOxidationState | +3 ⓘ |
| compound |
curium(III) chloride (CmCl3)
NERFINISHED
ⓘ
curium(III) oxide (Cm2O3) ⓘ curium(IV) oxide (CmO2) ⓘ |
| crystalStructure | double hexagonal close-packed (dhcp) at room temperature ⓘ |
| density | about 13.5 g/cm³ at room temperature ⓘ |
| discoveredBy |
Albert Ghiorso
NERFINISHED
ⓘ
Glenn T. Seaborg NERFINISHED ⓘ Ralph A. James NERFINISHED ⓘ |
| discoveryPlace | University of California, Berkeley NERFINISHED ⓘ |
| discoveryYear | 1944 ⓘ |
| electronicConfiguration | [Rn] 5f7 6d1 7s2 ⓘ |
| group | actinides ⓘ |
| halfLife |
curium-244: about 18.1 years
ⓘ
curium-247: about 15.6 million years ⓘ |
| hazard |
high radiotoxicity
ⓘ
strong alpha emitter requiring shielding ⓘ |
| isotopes |
curium-242
NERFINISHED
ⓘ
curium-244 NERFINISHED ⓘ curium-245 NERFINISHED ⓘ curium-246 NERFINISHED ⓘ curium-247 NERFINISHED ⓘ |
| meltingPoint | 1340 °C ⓘ |
| mostCommonResearchIsotope | curium-244 NERFINISHED ⓘ |
| namedAfter |
Marie Curie
NERFINISHED
ⓘ
Pierre Curie NERFINISHED ⓘ |
| notableProperty | no stable isotopes ⓘ |
| occurrence | synthetic; not found in nature in significant quantities ⓘ |
| oxidationState |
+3
ⓘ
+4 ⓘ |
| positionInPeriodicTable |
actinide series
ⓘ
f-block ⓘ period 7 ⓘ |
| productionMethod |
multiple neutron capture and beta decay of lighter actinides
ⓘ
neutron irradiation of plutonium in nuclear reactors ⓘ |
| radioactiveDecayMode | alpha decay (for many isotopes) ⓘ |
| radioactivity | highly radioactive ⓘ |
| standardAtomicWeight | (247) ⓘ |
| symbol | Cm ⓘ |
| use |
radioisotope power sources (limited, experimental)
ⓘ
scientific research ⓘ source of alpha particles ⓘ target material for synthesis of heavier transuranium elements ⓘ |
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: curium Description of subject: Curium is a synthetic, highly radioactive metallic element in the actinide series, used mainly in scientific research and as a source of alpha particles.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.