72
Hf
178.49
Hafnium
Element 72 · 178.49 u · d-block
transition metal
A lustrous, silvery metal used in nuclear control rods and processors. Often found alongside zirconium.
Phase (STP)
Solid
Melting Point
2233 °C
Boiling Point
4603 °C
Density
13.31 g/cm³
Electronegativity
1.3
Atomic Radius
155 pm
Ionization Energy
659 kJ/mol
Electron Affinity
23 kJ/mol
Discovered
1923 · Dirk Coster
Electron Configuration
[Xe] 4f14 5d2 6s2
Electron Orbitals
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