Tungsten
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
TUNGSTEN tung st n Swed.,=heavy stone, metallic chemical element...at 20 degrees Celsius; valence +2, +3, +4, +5, or +6. Tungsten is a very hard, silver-white to steel-gray metal with...symbol is taken from this name; in naming compounds of tungsten, use of the name wolfram as a root is preferred. Tungsten...