Platinum |
Symbol | Pt |
---|---|
Latin name | Platinium |
Atomic number | 78 |
Period | 6 |
Element category | Transition elements |
Relative atomic mass | 195.08 |
Group | VIII.B |
Electronegativity | 2.2 |
Oxidation numbers | 2, 4, 6 |
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d9 6s1 |
Density [g/cm3] | 21.45 |
State | Solid |
Melting point [°C] | 1772 |
Boiling point [°C] | 3827 |
Atomic radius [pm] | 177 |
Covalent radius [pm] | 128 |
Thermal conductivity [W m-1K-1] | 71.6 |
Heat capacity [J K-1g-1] | 0.13 |
Discovery | 1735 |
Hardness [Mohs scale] | 4.3 |
Vickers hardness [MPa] | 549 |
Brinell hardness [MPa] | 392 |
Young's modulus [GPa] | 168 |
Electrical conductivity [S m-1] | 9.4 · 106 |
Electrical resistivity [10-6Ω.m] | 0.106 |
Shear modulus [GPa] | 61 |
1.st ionization energy [eV] | 9.0 |
2.nd ionization energy [eV] | 18.563 |
Stable isotopes | 6 |
Unstable isotopes | 28 |