Assertion: tritium's life | /r/HasProperty | radioactive material
Facets:
value: highly
type: DEGREE
Source sentences:
text: Its half life is 12.36 years – much, much less than the over 1600 years half life of radium, a highly radioactive material that had been used on watch dials and hands over half a century ago (you can read more about that on page 2 of our History of Dive Watches article here).