Assertion: thorium's number | /r/HasProperty | atomic
Facets:
Source sentences:
text: Thorium (Th), radioactive chemical element of the actinoid series of the periodic table, atomic number 90; it is a useful nuclear reactor fuel.
text: Atomic number 90; atomic weight 232.038; approximate melting point 1,750°C; approximate boiling point 4,500°C; approximate specific gravity 11.7; valence 4.
text: It has the chemical symbol Th and the atomic number 90.
text: Thorium (symbol Th, atomic number 90) is a radioactive chemical element.
text: Thorium is a radioactive chemical element that has the atomic number 90 and the symbol
text: Thorium is a radioactive chemical element that has the atomic number 90 and the symbol Th.
text: Atomic number, 90; atomic weight, 232.038.