## Strontium |

Symbol | Sr |
---|---|

Latin name | Strontium |

Atomic number | 38 |

Period | 5 |

Element category | Alkaline earth metals |

Relative atomic mass | 87.62 |

Group | II.A |

Electronegativity | 1.0 |

Oxidation numbers | 2 |

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

Density [g/cm^{3}] | 2.6 |

State | Solid |

Melting point [°C] | 769 |

Boiling point [°C] | 1384 |

Atomic radius [pm] | 219 |

Covalent radius [pm] | 182 |

Thermal conductivity [W m^{-1}K^{-1}] | 35.3 |

Heat capacity [J K^{-1}g^{-1}] | 0.3 |

Discovery | 1790 |

Hardness [Mohs scale] | 1.8 |

Electrical conductivity [S m^{-1}] | 2 · 10 ^{6} |

1.st ionization energy [eV] | 5.6948 |

2.nd ionization energy [eV] | 11.03 |

3.rd ionization energy [eV] | 43.6 |

Stable isotopes | 4 |

Unstable isotopes | 13 |