strontium
Strontium
Strontium is a chemical element with the symbol Sr and atomic number 38. It belongs to the group of alkaline earth metals and is a soft, silvery-white metal. Strontium was discovered in 1790 by Adair Crawford and named after the Scottish village of Strontian, where it was first found.
Properties of Strontium
- Atomic number: 38
- Symbol: Sr
- Atomic mass: 87.62 u
- Group: Alkaline earth metals
- State at room temperature: Solid
- Density: 2.64 g/cm³
- Melting point: 777 °C
- Boiling point: 1377 °C
Discovery and History
Strontium was discovered in 1790 by Adair Crawford while examining minerals from the area around Strontian, Scotland. It was later isolated in 1808 by Humphry Davy, who used the method of electrolysis.
Applications and Uses
Strontium has various applications in industry and technology:
- Pyrotechnics: Strontium salts are used to produce red colors in fireworks and signal flares.
- Medicine: Strontium ranelate is used to treat osteoporosis by increasing bone strength.
- Electronics: Strontium titanate is used in manufacturing electronic components, particularly in capacitors.
- Phosphors: Strontium aluminates are used in glow-in-the-dark paints and emergency lighting due to their long-lasting afterglow effect.
Safety Measures
Strontium and its compounds are generally not highly toxic, but some strontium isotopes are radioactive and require special precautions. Protective measures should be taken to avoid contact and ingestion.
Additional Information
Further information on strontium and its applications can be found on scientific websites and in specialized literature.
Conclusion
Strontium is a versatile element with important applications across various industries. It plays a significant role in pyrotechnics, medicine, and electronics, contributing to the development of modern technologies.