Assertion: carnotite's radium | /r/HasProperty | ra
Facets:
Source sentences:
text: In this scheme, 223Ra was named actinium X (AcX), 224Ra thorium X (ThX), 226Ra radium (Ra), and 228Ra mesothorium 1 (MsTh 1 ).
text: Radium (Ra) has no stable isotopes.
text: Radium (Ra) has 33 different known isotopes, four of which are found in nature, with 226Ra being the most common.