Assertion: fermium's isotope | /r/HasProperty | the 20-hour 255fm
Facets:
Source sentences:
text: The isotope produced was the 20-hour 255Fm.
text: The isotope produced was the 20-hour 255Fm.
text: The isotope produced was the 20-hour 255Fm.
text: The isotope produced was the 20-hour 255Fm.
text: The isotope produced was the 20-hour 255Fm.