A brittle, hard metal, resembling iron and nickel in appearance, cobalt has a magnetic permeability approximately two thirds that of iron. It is frequently obtained as a byproduct of nickel, silver, lead, copper, and iron ores and is present in...
Tungsten: a metal with superlative properties As pure metal, tungsten has not only the highest melting point of all metals (3, 422°C) and the lowest degree of thermal expansion, but it is also very dense (19.3 g/cm³), has a high degree of...
Cobalt is a hard and brittle metal that appears similar to nickel and iron, however, has two third magnetic permeability of iron. It is mainly produced as a by-product of ores of copper, iron, lead, silver and nickel. The exceptional magnetic strength of this metal is the reason...
About Selenium Is A Chemical Element With Symbol Se And Atomic Number 34. Â Properties Exists In Two Forms: A Silvery Metal Or A Powder. Red Selenium Is An Amorphous, Glass-Like Solid, Whereas Grey Selenium Is A Soft, Bluish-Grey Metal. Grey Selenium Is A Semi-Conductor. Its...
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