Statements (29)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Subatomic particle
|
| gptkbp:atomicNumber |
2
|
| gptkbp:charge |
+2e
|
| gptkbp:composition |
2 neutrons
2 protons |
| gptkbp:discoveredBy |
gptkb:Ernest_Rutherford
|
| gptkbp:discoveredIn |
1899
|
| gptkbp:emits |
alpha decay
radioactive decay |
| gptkbp:equivalentTo |
gptkb:helium-4_nucleus
|
| https://www.w3.org/2000/01/rdf-schema#label |
Alpha particle
|
| gptkbp:ionizingPower |
high
|
| gptkbp:mass |
approximately 4 u
|
| gptkbp:massNumber |
4
|
| gptkbp:namedAfter |
first letter of Greek alphabet
|
| gptkbp:penetration |
low
|
| gptkbp:range |
4–9 MeV (typical from decay)
|
| gptkbp:riskFactor |
dangerous if ingested or inhaled
|
| gptkbp:speed |
~5% speed of light (from decay)
|
| gptkbp:spin |
0
|
| gptkbp:stopsAt |
gptkb:newspaper
gptkb:skin |
| gptkbp:symbol |
α
He²⁺ |
| gptkbp:usedIn |
radiation therapy
nuclear physics experiments smoke detectors |
| gptkbp:bfsParent |
gptkb:Particle
|
| gptkbp:bfsLayer |
5
|