Assertion: hafnium's point | /r/HasProperty | 2,220°c
Facets:
Source sentences:
text: Atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4.
text: Its atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4.