Assertion: tungsten | /r/HasProperty | w
Facets:
Source sentences:
text: Tungsten (W) , also called wolfram , chemical element , an exceptionally strong refractory metal of Group 6 (VIb) of the periodic table , used in steels to increase hardness and strength and in lamp filaments.
text: Tungsten (W) is a gray-white metallic element that is stable and is very resistant to acids and bases.
text: Tungsten (W) is a gray-white metallic element that is stable and is very resistant to acids and bases.
text: Tungsten (W) was one of the first alloying elements to be used methodically—as early as the mid-19th century—to enhance the properties of steel.