Zirconium |
Symbol | Zr |
---|---|
Latin name | Zirkonium |
Atomic number | 40 |
Period | 5 |
Element category | Transition elements |
Relative atomic mass | 91.244 |
Group | IV.B |
Electronegativity | 1.4 |
Oxidation numbers | 4 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d2 5s2 |
Density [g/cm3] | 6.506 |
State | Solid |
Melting point [°C] | 1852 |
Boiling point [°C] | 3800 |
Atomic radius [pm] | 206 |
Covalent radius [pm] | 148 |
Thermal conductivity [W m-1K-1] | 22.7 |
Heat capacity [J K-1g-1] | 0.278 |
Discovery | 1789 |
Hardness [Mohs scale] | 5.0 |
Vickers hardness [MPa] | 903 |
Brinell hardness [MPa] | 650 |
Young's modulus [GPa] | 68 |
Electrical conductivity [S m-1] | 2.3 · 106 |
Shear modulus [GPa] | 33 |
1.st ionization energy [eV] | 6.6339 |
2.nd ionization energy [eV] | 13.13 |
3.rd ionization energy [eV] | 22.99 |
Stable isotopes | 5 |
Unstable isotopes | 16 |