Assertion: hafnium's isotope | /r/HasProperty | observed as decay products of elements
Facets:
Source sentences:
text: The heaviest isotope produced by direct fusion is 262Rf; heavier isotopes have only been observed as decay products of elements with larger atomic numbers.
text: The heaviest isotope produced by direct fusion is 271Hs; heavier isotopes have only been observed as decay products of elements with larger atomic numbers.