Assertion: hafnium | /r/HasProperty | a transition metal
Facets:
Source sentences:
text: It is a transition metal and resembles zirconium in its chemical properties, as both have equal number of valence electrons.
text: There has been some controversy surrounding the discovery of hafnium and the extent to which Coster and Hevesy were guided by Bohr's prediction that hafnium would be a transition metal rather than a rare earth element.
text: Hafnium is a transition metal.
text: Hafnium is a transition metal.