2007-05-25 16:30:53 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It's in group number 5 and symbol is Ta.
atomic number:73
Period:6
Atomic weight:180.94788
Block:d
State: solid at 298 K
Color: Grey Blue
Tantalum is a greyish silver, heavy, and very hard metal. When pure, it is ductile and can be drawn into fine wire, which can be used as a filament for evaporating metals such as aluminium. Tantalum is almost completely immune to chemical attack at temperatures below 150°C, and is attacked only by hydrofluoric acid, acidic solutions containing the fluoride ion, and free sulphur trioxide. The element has a melting point exceeded only by tungsten and rhenium.
2007-05-25 16:46:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Tantalum is a chemical element in the periodic table that has the symbol Ta and atomic number 73. It's a transition metaI. The atomic mass is about 180.
2007-05-25 23:35:44 · answer #2 · answered by Victoria 2 · 0⤊ 0⤋
Ta is used in electronics a lot because of the high dialectric constant of it's oxide (Ta2O5). They are expensive capacitors but very stable ones. The military loves them. Ta2O5 is used in some glass making. It is a glass former like SiO2 and some very exotic glasses are made using it. Some of the superconductors use Tantalum in the alloys. It is used in a strange group of alloys which are melted and cooled very quickly to a state which is more glassy than metal called Metglasses. They have not found the uses that were promised when they were perfected 30 years ago. It is tolerated in bodies and has been used in implants but is loosing to Titanium. Equipment made from Ta is extremely resistant to most acids. Whichever form it's in, it's expensive. The oxide Ta2O5 went for $1 per gram (optical quality) 5 years ago. Hope this helps.
2007-05-26 00:10:06 · answer #3 · answered by Brian T 6 · 0⤊ 0⤋
Tantalum is a heavy metal. It has a very high melting point. It can be worked into foil, and is used in high temperature processes. The metal must be kept clean of human fingerprints, since the chemicals on the hands can oxidize the tantulum. It is not cheap.
2007-05-25 23:51:20 · answer #4 · answered by cattbarf 7 · 0⤊ 0⤋
Not really sure what you are wanting to know. You have some good answers here. As already mentioned Tantalum is used primarily in electronics because its electrical properties are very stable through a very wide range of temperatures.
2007-05-29 22:42:38 · answer #5 · answered by Charles C 7 · 0⤊ 0⤋