| Element | Tantalum | Symbol | Ta |
| Atomic Number | 73 | Molar Mass | 180.95 gmol-1 |
| Electron Configuration | [Xe]4f145d36s2 | Normal State | solid metal |
| Density @STP | 16.67 g cm-3 | Melting Point | 3017oC |
| Boiling Point | 5458oC | Stable Isotopes | 180Ta, 181Ta |
| Atomic Radius | 147 pm | Ionic Radius | 72 (3+) pm |
| Electronegativity (Pauling) | 1.5 | Ionization Energy (1st) | 761 kJ mol-1 |
| Ionization Energy (2nd) | 1500 kJ mol-1 | Ionization Energy (3rd) | 2100 kJ mol-1 |
| Molar Heat Capacity | 25.4 J K-1mol-1 | Standard Molar Entropy | 41.5 J K-1mol-1 |
| Enthalpy of Fusion | 31.4 kJ mol-1 | Enthalpy of Vapourization | 753.1 kJ mol-1 |