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Вольфрам

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Брелок 20х30 мм. Вольфрам. W Keyring 20x30 mm. Articul: pt74
600,00 ₽
Брелок. Вольфрам. Trinket. Tungsten. Articul: 7417120420
830,00 ₽
Вольфрам (W), 99,9%, 0,5 гр. – в стеклянной баночке. Tungsten (W), 99.9%, 0.5 g - in a glass jar. Articul: 7482120419
285,00 ₽
Tungsten cube (W), 99.95, 10x10 mm. Articul: 74131140119
1 550,00 ₽
Кулон. Вольфрам. Pendant. Tungsten. Articul: 7418120320
850,00 ₽
Пуговица 18 мм. Вольфрам. W. Chemical button 18 mm. Articul: but74
340,00 ₽
Вольфрам

 
Atomic number       74
Atomic mass         183.85
Density, kg / m?       19300
Temperature
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.
 

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