Assertion: polonium's life | /r/HasProperty | 138.376 days
Facets:
value: for polonium
type: LOCATION
Source sentences:
text: Half life is 138.376 days for polonium 210.
text: The short half-life of polonium (138.376 days) required frequent replacement of initiators and a continued supply of polonium for their manufacture, as their shelf life was only about 4 months.