Брелок 20х30 мм. Вольфрам. W Keyring 20x30 mm. Articul: pt74
600,00 ₽
Брелок 20х40 мм. Вольфрам (W) W keychain 20x40 mm. Articul: 74877
700,00 ₽
Брелок. Вольфрам. Trinket. Tungsten. Articul: 7417120420
830,00 ₽
Tungsten cube (W), 99.95, 10x10 mm. Articul: 74131140119
1 550,00 ₽
Вольфрамовый кубик (W), 99,95%, 1 дюйм (25,4 мм) Tungsten 99.95 (W) 1 inch cube Articul: 1inch74
10 500,00 ₽
Кулон. Вольфрам. Pendant. Tungsten. Articul: 7418120320
850,00 ₽
Пуговица 18 мм. Вольфрам. W. Chemical button 18 mm. Articul: but74
340,00 ₽

Atomic number       74
Atomic mass         183.85
Density, kg / m?       19300
melting, ° С           3410
Tungsten is a hard shiny silver-gray transition metal. In 1781, the famous Swedish chemist Scheele, treating the scheelite mineral with nitric acid, obtained a yellow “heavy stone” (tungsten trioxide). In 1783, the Spanish chemists Eluard brothers reported on obtaining from the Saxon mineral wolframite both a yellow oxide of a new metal soluble in ammonia, and the metal itself. The refractoriness and plasticity of tungsten make it indispensable for filaments in lighting fixtures, as well as in picture tubes and other vacuum tubes.