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bn:01874917n
Noun Concept
SYL
No term available
EN
Although there are nine known isotopes of helium, only helium-3 and helium-4 are stable. Wikipedia
Relations
Sources
IS A
EN
isotope
HAS INSTANCE
EN
helium-4
EN
helium-3
EN
helium-8
EN
helium-9
EN
helium-10
+4 relations

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