Assertion: protactinium | /r/CapableOf | represent the boundary
Facets:
Source sentences:
text: Protactinium, Wilson noted, is particularly important because it represents the boundary at which a ‘d’ orbital and an ‘f’ orbital change places energetically.
text: Protactinium, Wilson noted, is particularly important because it represents the boundary at which a 'd' orbital and an 'f' orbital change places energetically.