- Bahan baku dan Mineral
- Produk Besi Baja
- Komponen bangunan dan struktur baja
- Penyambungan baja dan peralatannya
- Pelapis baja, pelindung baja dan peralatannya
- Software Baja
- Mesin Industri Baja, Peralatan & Alat
- Pemindah, Pengangkat & Alat Berat
- Peralatan Inspeksi Dan Testing
- Pelindung Keselamatan
- Produk, komponen dan Peralatan yang menggunakan besi
- Pelayanan Baja
- Perbankan Dan Asuransi
Sr ( Strontium )
Strontium will burn in air and reacts with water more vigorously than calcium. It is usually kept under paraffin to prevent oxidation. A. Crawford first recognized strontium as an element in 1790, but it wasn't isolated until 1808 by Sir Humphry Davy in London England.
Nama lain (trademark, branding etc.)
Strontium, Stroncium, Stroncij, Strontium - s, Estrôncio, Стронций,
Spesifikasi ProdukOverview of Strontium Atomic Number 38 Group 2 Period 5 Series Alkali Earth Metals Relative Atomic Mass (12C=12.000) 87.62 Boiling Point: 1657K 1384°C 2523°F Melting Point: 1042K 769°C 1416°F Density/kg m-3 2540 (293K) Ground State Electron Configuration [Kr]5s2 Electron Affinity(M-M-)/kJ mol-1 146 Discovery Year: 1790 Name Origin: From Strontian a small Scottish town.
Strontium is mainly used for producing glass for colour television sets. It is also used in producing ferrite magnets and refining zinc. One of the radioactive isotopes of strontium, 90Sr, is a product of nuclear fallout and presents a health problem. It has a half-life of 28 years. It is absorbed by bone tissue instead of calcium and can destroy bone marrow and cause cancer. However, it is also a useful isotope as it is one of the best high-energy beta-emitters known.
Strontium (/ˈstrɒntiəm/ stron-tee-əm) is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air. Strontium has physical and chemical properties similar to those of its two neighbors calcium and barium. It occurs naturally in the minerals celestine and strontianite. While natural strontium is stable, the synthetic 90Sr isotope is present in radioactive fallout and has a half-life of 28.90 years.
Konten Indikasi Harga belum tersedia