Strontium (Sr) — Element 38: Properties & Data | Aladdin Scientific
Strontium(Sr) — Element 38
Strontium (Sr) is a alkaline earth metal with atomic number 38 and atomic mass 87.62. It has melting point 1050 K (777 °C), boiling point 1655 K (1382 °C), density 2.64 g/cm³. It sits in group 2 and period 5 of the periodic table and was discovered in 1790.
Key facts
| Atomic mass | 87.6200 u |
|---|---|
| Electron configuration | [Kr]5s2 |
| Oxidation states | +2 |
| Electronegativity (Pauling) | 0.95 |
| Atomic radius (van der Waals) | 249 pm |
| Ionization energy | 5.695 eV |
| Melting point | 1050 K |
| Boiling point | 1655 K |
| Density | 2.64 g/cm³ |
| Standard state | Solid |
| Year discovered | 1790 |
Frequently asked questions
What is the electron configuration of strontium?
The ground-state electron configuration of strontium is [Kr]5s2.
What group and period is strontium in?
Strontium (Sr) is in group 2 and period 5 of the periodic table, classified as a alkaline earth metal.
What is the melting point of strontium?
Strontium melts at 1050 K (777 °C).
What is the standard state of strontium?
Strontium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .