## Samarium |

Symbol | Sm |
---|---|

Latin name | Samarium |

Atomic number | 62 |

Period | 6 |

Element category | Inner transition elements |

Relative atomic mass | 150.36 |

Group | III.B |

Electronegativity | 1.2 |

Oxidation numbers | 2, 3 |

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^{6} 5d^{0} 6s^{2} |

Density [g/cm^{3}] | 7.54 |

State | Solid |

Melting point [°C] | 1077 |

Boiling point [°C] | 1791 |

Atomic radius [pm] | 238 |

Covalent radius [pm] | 162 |

Thermal conductivity [W m^{-1}K^{-1}] | 13.3 |

Heat capacity [J K^{-1}g^{-1}] | 0.197 |

Discovery | 1879 |

Vickers hardness [MPa] | 412 |

Brinell hardness [MPa] | 441 |

Young's modulus [GPa] | 50 |

Electrical conductivity [S m^{-1}] | 1.1 · 10 ^{6} |

Shear modulus [GPa] | 20 |

1.st ionization energy [eV] | 5.6437 |

2.nd ionization energy [eV] | 11.069 |

3.rd ionization energy [eV] | 23.423 |

Stable isotopes | 7 |

Unstable isotopes | 13 |