helium-4
E761917
Helium-4 is the most common stable isotope of helium, consisting of two protons and two neutrons, and is a key product of both Big Bang nucleosynthesis and stellar fusion.
All labels observed (1)
| Label | Occurrences |
|---|---|
| helium-4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8832095 — 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: helium-4 Context triple: [antiprotonic helium, isFormedIn, helium-4]
-
A.
helium-3
Helium-3 is a rare, light, non-radioactive isotope of helium valued for its role in nuclear fusion research and as a tracer in astrophysics and low-temperature physics.
-
B.
Helium
Helium is a lightweight, educational implementation of the Haskell programming language designed to simplify learning and teaching functional programming.
-
C.
beryllium
Beryllium is a lightweight, hard, gray alkaline earth metal used in specialized applications such as aerospace components, nuclear reactors, and X-ray equipment.
-
D.
Protium
Protium is a genus of tropical trees and shrubs known for producing aromatic resins and belonging to the frankincense and myrrh family.
-
E.
nitrogen-14
Nitrogen-14 is the most abundant stable isotope of nitrogen and a key intermediate nucleus in stellar fusion processes such as the CNO (Bethe–Weizsäcker) cycle.
- 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: helium-4 Target entity description: Helium-4 is the most common stable isotope of helium, consisting of two protons and two neutrons, and is a key product of both Big Bang nucleosynthesis and stellar fusion.
-
A.
helium-3
Helium-3 is a rare, light, non-radioactive isotope of helium valued for its role in nuclear fusion research and as a tracer in astrophysics and low-temperature physics.
-
B.
Helium
Helium is a lightweight, educational implementation of the Haskell programming language designed to simplify learning and teaching functional programming.
-
C.
beryllium
Beryllium is a lightweight, hard, gray alkaline earth metal used in specialized applications such as aerospace components, nuclear reactors, and X-ray equipment.
-
D.
Protium
Protium is a genus of tropical trees and shrubs known for producing aromatic resins and belonging to the frankincense and myrrh family.
-
E.
nitrogen-14
Nitrogen-14 is the most abundant stable isotope of nitrogen and a key intermediate nucleus in stellar fusion processes such as the CNO (Bethe–Weizsäcker) cycle.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
alpha particle
ⓘ
boson ⓘ helium isotope ⓘ nucleus ⓘ stable isotope ⓘ |
| atomicNumber | 2 ⓘ |
| bindingEnergyPerNucleon | ≈7.07 MeV ⓘ |
| boilingPointAt1atm | ≈4.22 K ⓘ |
| bosonicStatistics | Bose–Einstein NERFINISHED ⓘ |
| charge | +2e (nucleus) ⓘ |
| chemicalElement | helium ⓘ |
| cosmologicalMassFraction | ≈0.24–0.25 of baryonic matter ⓘ |
| discoveredAsAlphaParticleBy | Ernest Rutherford NERFINISHED ⓘ |
| dominantIsotopeOf | helium ⓘ |
| electricCharge | +2 elementary charges ⓘ |
| firstIonizationEnergy | same as helium ≈24.6 eV ⓘ |
| formationProcess |
Big Bang nucleosynthesis
NERFINISHED
ⓘ
alpha decay of heavier nuclei ⓘ stellar hydrogen fusion ⓘ |
| formsSuperfluidPhase | true ⓘ |
| isAlphaParticle | true ⓘ |
| isMagicNucleus | true ⓘ |
| isStable | true ⓘ |
| magicNeutronNumber | 2 ⓘ |
| magicProtonNumber | 2 ⓘ |
| mass |
≈4.002602 u
ⓘ
≈6.6465×10^-27 kg ⓘ |
| massNumber | 4 ⓘ |
| meltingPointAt1atm | doesNotMelt (solidifies only under pressure) ⓘ |
| naturalAbundanceInHelium | >0.99 ⓘ |
| neutronNumber | 2 ⓘ |
| neutronSeparationEnergy | high ⓘ |
| nuclearSpin | 0 ⓘ |
| nucleonNumber | 4 ⓘ |
| occursIn |
Sun
NERFINISHED
ⓘ
interstellar medium ⓘ main-sequence stars ⓘ |
| productOf |
CNO cycle
NERFINISHED
ⓘ
proton–proton chain reaction ⓘ |
| protonNumber | 2 ⓘ |
| protonSeparationEnergy | high ⓘ |
| radioactive | false ⓘ |
| roleInCosmology | key probe of Big Bang nucleosynthesis ⓘ |
| superfluidTransitionTemperature | ≈2.17 K (lambda point) ⓘ |
| symbol | 4He ⓘ |
| totalBindingEnergy | ≈28.3 MeV ⓘ |
| usedAs |
carrier gas in some analytical instruments
ⓘ
coolant for superconducting magnets ⓘ cryogenic coolant ⓘ working fluid in low-temperature physics experiments ⓘ |
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: helium-4 Description of subject: Helium-4 is the most common stable isotope of helium, consisting of two protons and two neutrons, and is a key product of both Big Bang nucleosynthesis and stellar fusion.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.