Assertion: occurring actinium | /r/HasProperty | 1 radioactive isotope
Facets:
Source sentences:
text: Naturally occurring actinium is composed of 1 radioactive isotope; with 227-Ac being the most abundant (100% natural abundance).
text: Naturally occurring actinium is composed of two radioactive isotopes;
text: Naturally occurring actinium is composed of 1 radioactive isotope; with 227-Ac being the most abundant (100% natural abundance).
text: Naturally occurring actinium is composed of 1 radioactive isotope;
text: Naturally occurring actinium is composed of two radioactive isotopes;