tungsten

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tungsten (wolfram, symbol W) Silvery-grey, hard, metallic element, one of the transition elements. Tungsten has the highest melting point of all metals and is used for lamp filaments and in special alloys. Tungsten carbide is used in high-speed cutting tools. Chemically, tungsten is fairly unreactive; it oxidizes only at high temperatures. Properties: at.no. 74; r.a.m. 183.85; r.d. 19.3; m.p. 3410°C (6170°F); b.p. 5660°C (10,220°F); most common isotope W184 (30.64%).

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