Tantalum is an element with atomic number 73, atomic weight 180.88, density 16.6, melting at 3017 ° C and obtained in the state of a black powder. Its symbol is Ta. It was discovered in Sweden in 1802. The element is named after Tantalus in Greek mythology. It is hard, rare and very resistant to corrosion. The main source is tantalite mineral and they are always found with niobium.
It is often used as an economical replacement element instead of platinum. Tantalum is alloyed with steel to increase the steel's ductility, strength, and melting point. Tantalum pentoxide can be used to make capacitors and to increase refractive power in camera lenses. Tantalum and its alloys are resistant to corrosion and wear, and tantalum is used to make surgical and dental instruments and various in-body prostheses. A composite of tantalum carbide and graphite is one of the hardest materials known and is used in cutting edges of high speed machine tools
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