## Cerium |

Symbol | Ce |
---|---|

Latin name | Cerium |

Atomic number | 58 |

Period | 6 |

Element category | Inner transition elements |

Relative atomic mass | 140.115 |

Group | III.B |

Electronegativity | 1.1 |

Oxidation numbers | 3, 4 |

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^{1} 5d^{1} 6s^{2} |

Density [g/cm^{3}] | 6.7 |

State | Solid |

Melting point [°C] | 799 |

Boiling point [°C] | 3426 |

Covalent radius [pm] | 165 |

Thermal conductivity [W m^{-1}K^{-1}] | 11.4 |

Heat capacity [J K^{-1}g^{-1}] | 0.19 |

Discovery | 1803 |

Hardness [Mohs scale] | 2.5 |

Vickers hardness [MPa] | 270 |

Brinell hardness [MPa] | 412 |

Young's modulus [GPa] | 34 |

Electrical conductivity [S m^{-1}] | 1.4 · 10 ^{6} |

Shear modulus [GPa] | 14 |

1.st ionization energy [eV] | 5.5387 |

2.nd ionization energy [eV] | 10.851 |

3.rd ionization energy [eV] | 20.2 |

Stable isotopes | 4 |

Unstable isotopes | 15 |