## Ruthenium |

Symbol | Ru |
---|---|

Latin name | Ruthenium |

Atomic number | 44 |

Period | 5 |

Element category | Transition elements |

Relative atomic mass | 101.07 |

Group | VIII.B |

Electronegativity | 2.2 |

Oxidation numbers | 2, 3, 4, 6, 8 |

Electron configuration | 1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{6} 4d^{7} 5s^{1} |

Density [g/cm^{3}] | 12.41 |

State | Solid |

Melting point [°C] | 2300 |

Boiling point [°C] | 4000 |

Atomic radius [pm] | 178 |

Covalent radius [pm] | 126 |

Thermal conductivity [W m^{-1}K^{-1}] | 117 |

Heat capacity [J K^{-1}g^{-1}] | 0.238 |

Discovery | 1843 |

Hardness [Mohs scale] | 6.5 |

Brinell hardness [MPa] | 2160 |

Young's modulus [GPa] | 447 |

Electrical conductivity [S m^{-1}] | 1.4 · 10 ^{7} |

Shear modulus [GPa] | 173 |

1.st ionization energy [eV] | 7.3605 |

2.nd ionization energy [eV] | 16.76 |

3.rd ionization energy [eV] | 28.47 |

Stable isotopes | 7 |

Unstable isotopes | 9 |