| Property | Value |
|---|---|
| Atomic number | 73 |
| Atomic weight | 180.94791 amu |
| Element family | Transition metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 181Ta: 99.988% |
| Previous element | Hafnium |
| Next element | Tungsten |
| Density | 16.654 g/cm3 (STP) |
| Melting | 2996 °C |
| Boiling | 5425 °C |
| Covalent radius | 1.46 Å |
| Ionic radius | 0.64 Å |
| Metallic radius | 1.46 Å |
| First ionization potential | 7.887 eV |
| Electron affinity | 0.323 eV |
| Electronegativity | 1.5 |
| Discovery year | 1802 |
| Sample reactions |
|---|
| Ta + Cl2 = TaCl5 |
| Ta + Cl = TaCl5 |
Tantalum is an element number 73 from transition metals family. Its symbol is Ta. Tantalum atomic weight is 180.94791 amu. Ta stable and long lived isotopes are 181Ta: 99.988%. Tantalum electronic configuration is 1s22s22p63s23p63d104s24p64d104f145s25p66s25d3. Sample compounds that contain Tantalum are Ta2O5, TaC.
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