72Hf
Hafnium
Transition MetalHafnium (Hf) is element 72, a transition metal, in period 6 and group 4 of the periodic table. Its standard atomic weight is 178.49, it melts at 2233 °C and boils at 4603 °C. Discovered by Dirk Coster, 1923.
Atomic Number72
SymbolHf
NameHafnium
Atomic Weight178.49 u
CategoryTransition Metal
Period6
Group4
Melting Point2233 °C
Boiling Point4603 °C
Density13.31 g/cm³
Electron Config[Xe] 4f14 5d2 6s2
Discovered ByDirk Coster, 1923