## 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 | 1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{6} 4d^{10} 5s^{2} 5p^{6} 4f^{14} 5d^{9} 6s^{1} |

Density [g/cm^{3}] | 21.45 |

State | Solid |

Melting point [°C] | 1772 |

Boiling point [°C] | 3827 |

Atomic radius [pm] | 177 |

Covalent radius [pm] | 128 |

Thermal conductivity [W m^{-1}K^{-1}] | 71.6 |

Heat capacity [J K^{-1}g^{-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 · 10 ^{6} |

Electrical resistivity [10^{-6}Ω.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 |