Assertion: astatine's radioactivity | /r/CapableOf | make sure
Facets:
Source sentences:
text: The key challenge is though to connect the radioactive astatine atoms to a molecule that will seek out specific cancer cells; then to the chemistry as soon as possible before the radioactivity decays away and to make sure that the astatine doesn't fall off its targeted molecule once it is injected into the body.