Assertion: protactinium's melting point | /r/HasProperty | its density
Facets:
Source sentences:
text: Its melting point is thought to be about 1,560°C (2,840°F) and its density about 15.37 grams per cubic centimeter.
text: Its melting point is thought to be about 1,560°C (2,840°F) and its density about 15.37 grams per cubic centimeter.