Tantalum properties will be discussed from tantalum natural properties and tantalum chemical properties.

The natural properties of tantalum:
Atomic ordinal number of tantalum is 73, atomic weight of tantalum is 180.9479. Tantalum was found in 1802 by the Swedish chemist-Maher J Berry tantalite and in 1903 the Russian chemist-Bolton isolated pure tantalum.
Tantalum is a rare metal. The content of tantalum in the crust is 0.0002%. Tantalum often coexists with niobium in nature. The main minerals include tantalite, microlite, etc.. Tantalum has two kinds of natural isotopes: tantalum 180 amd tantalum 181.
Tantalum is dark grey metal and it has ductility. The melting point and boiling point of tantalum are respectively 2996 °C and 5425 °C. The density of tantalum is 16.6 g / cm ³. In addition, tantalum has body-centered cubic structure.

As for the chemical properties of tantalum, it is particularly stable. Under normal temperature, tantalum can not be affected by the erosion of inorganic acid except for hydrofluoric acid; In high temperature, tantalum can be dissolved in concentrated sulfuric acid, concentrated phosphoric acid and alkali solution; tantalum can get tantalum pentoxide in the flow of oxygen by intense burning; Tantalum can react with fluorine under normal temperature; In high temperature, tantalum can be directly combined with chlorine, sulfur, nitrogen, carbon and other elementary substances.

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