Assertion: fermium's isotope | /r/HasProperty | magic
Facets:
value: doubly
type: DEGREE
Source sentences:
text: The heavy isotope 46Ca can also theoretically undergo double beta decay to 46Ti as well, but this has never been observed; the lightest and most common isotope 40Ca is also doubly magic and could undergo double electron capture to 40Ar, but this has likewise never been observed.