Assertion: polonium's life | /r/HasProperty | 138 days
Facets:
Source sentences:
text: The half-life of Po-210 is 138 days.
text: short half-life, just 138 days.
text: The radiation from the polonium element (which must be replaced every year or so because the half life is only 138 days) ionizes the air around the brush, making it conductive and carrying away the static charge.
text: Is the half-life about 138000 days or about 138 days?
text: Because polonium-210 has a short half-life (138 days), its usefulness was limited for application on long duration satellite and space probe missions.
text: The radioactive half-life of polonium-210 is 138 days; therefore, after 10 years there will be only about one millionth of a percent of the original polonium-210 remaining in his corpse.