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 | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 |
| Density [g/cm3] | 2.6 |
| State | Solid |
| Melting point [°C] | 769 |
| Boiling point [°C] | 1384 |
| Atomic radius [pm] | 219 |
| Covalent radius [pm] | 182 |
| Thermal conductivity [W m-1K-1] | 35.3 |
| Heat capacity [J K-1g-1] | 0.3 |
| Discovery | 1790 |
| Hardness [Mohs scale] | 1.8 |
| Electrical conductivity [S m-1] | 2 · 106 |
| 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 |