72Hf
Hafnium
하프늄 · ハフニウム
Transition metal
Atomic number72
ElementHf — Hafnium
Atomic mass178.49
CategoryTransition metal
Group4
Period6
Electron config[Xe] 4f14 5d2 6s2
Shells2,8,18,32,10,2
State (RT)Solid
Melting pt2233°C
Boiling pt4603°C
Electronegativity1.3
Discovered1923
Main usesNuclear control rods, alloys
2 · 8 · 18 · 32 · 10 · 2