Assertion: polonium's isotope | /r/HasAspect | half-life of 138 days
Facets:
Source sentences:
text: This isotope has a half-life of 138 days, so while the material has very high radioactivity, it is stable enough to be transported (usually from a location with nuclear reactors or other high level scientific equipment).
text: This isotope has a half-life of 138 days, so while the material has very high radioactivity, it is stable enough to be transported (usually from a location with nuclear reactors or other high level scientific equipment).
text: This isotope has a half-life of 138 days, so while the material has very high radioactivity, it is stable enough to be transported (usually from a location with nuclear reactors or other high level scientific equipment).