Nickel |
Symbol | Ni |
---|---|
Latin name | Niccolum |
Atomic number | 28 |
Period | 4 |
Element category | Transition elements |
Relative atomic mass | 58.69 |
Group | VIII.B |
Electronegativity | 1.8 |
Oxidation numbers | 2, 3 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d8 4s2 |
Density [g/cm3] | 8.908 |
State | Solid |
Melting point [°C] | 1455 |
Boiling point [°C] | 2732 |
Thermal conductivity [W m-1K-1] | 90.7 |
Heat capacity [J K-1g-1] | 0.444 |
Discovery | 1751 |
Hardness [Mohs scale] | 4.0 |
Vickers hardness [MPa] | 638 |
Brinell hardness [MPa] | 700 |
Young's modulus [GPa] | 200 |
Electrical conductivity [S m-1] | 1.4 · 107 |
Shear modulus [GPa] | 76 |
1.st ionization energy [eV] | 7.6398 |
2.nd ionization energy [eV] | 18.168 |
3.rd ionization energy [eV] | 35.17 |
Stable isotopes | 5 |
Unstable isotopes | 7 |