Assertion: actinium | /r/HasAspect | those of lanthanum
Facets:
Source sentences:
text: Actinium has chemical properties like those of lanthanum (number 57), the element just above it in the periodic table.
text: Giesel stated that Actinium has the similar properties like Lanthanum and called it Emanium.
text: Actinium has chemical properties like those of lanthanum (number 57), the element just above it in the periodic table.