Assertion: polonium's symbol | /r/HasProperty | ra
Facets:
Source sentences:
text: Radium is a chemical element with the symbol Ra and atomic number 88.
text: The element has an atomic number of 88, and it is identified with the symbol Ra on the periodic table of elements.
text: Radium has an atomic number of 88, and it is identified with the symbol Ra on the periodic table of elements.