e/ja/不安定核

Information
instance of	(noun) one of two or more atoms with the same atomic number but with different numbers of neutrons isotope

Meaning
Japanese
has gloss	jpn: 不安定核（ふあんていかく、Unstable nuclides）は、陽子と中性子のどちらかが過剰なせいで、短命な核種。
lexicalization	jpn: 不安定核