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- Name : Tantalum
- Symbol : Ta
- Atomic # : 73
- Atom weight: 180.948
- Melting P. : 2996
- Boiling P. : 5425
- Oxidation : +5
- Pronounced : TAN-te-lem
- From : Named for the mythological character, Tantalus, the father of
- Niobe.
- Identified : Anders Gustaf Ekenberg in 1802
- Appearance : Gray, heavy, hard metal
- Note : Comprises only 0.0002% of the earth's crust
-
- [Properties]
-
- Tantalum is one of the Group-VB, or vanadium group, elements on the
- periodic table of the elements. Notice that tantalum's twin element,
- niobium (Nb), is located directly above it on the table.
- Tantalum is usually described as a shiny gray metal that is very hard,
- but ductile. It has a very high melting point that is exceeded by tungsten
- (W) and rhenium (Re) which, incidentally, fall directly to the right of
- tantalum on the periodic table.
- This metal also resists attack from most chemicals at room temperature.
- It oxidizes very, very slowly to form the oxide. It reacts more vigorously
- with hydrofluoric acid (HF) to form tantalum pentafluoride.
-