| Property | Value |
|---|---|
| Atomic number | 38 |
| Atomic weight | 87.621 amu |
| Element family | Alkali earth metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 84Sr: 0.56%, 86Sr: 9.86%, 87Sr: 7.00%, 88Sr: 82.58% |
| Previous element | Rubidium |
| Next element | Yttrium |
| Density | 2.64 g/cm3 (STP) |
| Melting | 769 °C |
| Boiling | 1384 °C |
| Covalent radius | 1.85 Å |
| Van der Waals radius | 2.49 Å |
| Ionic radius | 1.12 Å |
| Metallic radius | 2.15 Å |
| First ionization potential | 5.695 eV |
| Electron affinity | 0.052 eV |
| Electronegativity | 0.95 |
| Discovery year | 1787 |
Strontium is an element number 38 from alkali earth metals family. Its symbol is Sr. Strontium atomic weight is 87.621 amu. Sr stable and long lived isotopes are 84Sr: 0.56%, 86Sr: 9.86%, 87Sr: 7.00%, 88Sr: 82.58%. Strontium electronic configuration is 1s22s22p63s23p63d104s24p65s2. Sample compounds that contain Strontium are Sr(NO3)2, SrCl2, Sr(OH)2, SrH2, SrF2, SrSO4.
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