Assertion: astatine | /r/HasAspect | 24 known nuclear isomers
Facets:
Source sentences:
text: Astatine has 24 known nuclear isomers, which are nuclei with one or more nucleons (protons or neutrons) in an excited state.
text: Astatine has 24 known nuclear isomers, which are nuclei with one or more nucleons (protons or neutrons) in an excited state.