Assertion: californium's isotope | /r/HasProperty | available
Facets:
Source sentences:
text: the most common 253Es isotope is available only once or twice a year in sub-milligram amounts – and self-contamination due to rapid conversion of einsteinium to berkelium and then to californium at a rate of about 3.3% per day:
text: It does not occur naturally and therefore ten isotopes are available which are radioactive.
text: It does not occur naturally and therefore ten isotopes are available which are radioactive.