Assertion: hafnium's symbol | /r/HasProperty | ha
Facets:
Source sentences:
text: The name "hahnium", albeit with the different symbol Ha, had already been proposed and used by the American scientists for element 105, for which they had a discovery dispute with JINR; they thus protested the confusing scrambling of names.
text: Hassium is a chemical element with the symbol Hs and the atomic number 108.