Zirconium

Atomic number40
Atomic weight91.224
Discovery (year)1789
Atomic radius (A)1.62
Melting point (oC)1852
Boiling point (oC)3578
Density (g/cm3)6.53
Specific heat (cal/g oC)0.066
Ionization potential (eV)6.84
Electron Affinity (eV)0.5