Tungsten
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Tungsten is a chemical element, having the chemical symbol W.
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Its atomic number (the number of protons) is 74. It has a Standard Atomic Weight of 183.84(1), and is typically found as a solid in its elemental form.
Tungsten is considered to be a member of the "Transition metal" class of elements, has a boiling point of 5,555 °C , and a melting point of 3,422 °C . Because of its very high melting point, tungsten filaments were used for many years in incandescent light bulbs.