| Ta | Tantalum | Atomic number : 73 Relative atomic mass (12C = 12.0000) : 180.9479 |
|||||||
| P H Y S I C A L D A T A | |
| Group 5 transition metal Density / kg m-3 : 16 654 [293 K]; 15 000 [liquid at m.p.] |
Melting point / K : 3269 Boiling point / K : 5698 ± 100 |
| D I S C O V E R Y | |
| Discovered in 1802 by A.G. Ekeberg at Uppsala, Sweden. |
|
| G E O L O G I C A L D A T A | |
| Abundances Sun (relative to H = 1 × 1012) : n.a. Earth's crust / p.p.m. : 2 Residence time / years : n.a. Oxidation state : V |
Seawater / p.p.m. : 2 × 10-6 |
| B I O L O G I C A L D A T A | |
| Level in humans Blood / mg dm-3 : n.a., but low Bone / p.p.m. : c. 0.03 Liver / p.p.m. : n.a. Muscle / p.p.m. : n.a., but low |
Daily dietary intake : 0.001 mg Total mass of element in average (70 kg) person : c. 0.2 mg |
 |
A portrait of tantalum is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |