Assertion: protactinium | /r/HasProperty | obtained in the +4 state
Facets:
Source sentences:
text: Protactinium in most of its compounds exhibits an oxidation state of +5 (thus resembling tantalum) but also can be obtained in the +4 state.
text: Protactinium in most of its compounds exhibits an oxidation state of +5 (thus resembling tantalum) but also can be obtained in the +4 state.