| Element | Antimony | Symbol | Sb |
| Atomic Number | 51 | Molar Mass | 121.75 gmol-1 |
| Electron Configuration | [Kr]4d105s25p3 | Normal State | solid metalloid |
| Density @STP | 6.69 g cm-3 | Melting Point | 631oC |
| Boiling Point | 1587oC | Stable Isotopes | 121Sb, 123Sb |
| Atomic Radius | 141 pm | Ionic Radius | 89 (3+) pm |
| Electronegativity (Pauling) | 2.05 | Ionization Energy (1st) | 834 kJ mol-1 |
| Ionization Energy (2nd) | 1794 kJ mol-1 | Ionization Energy (3rd) | 2443 kJ mol-1 |
| Molar Heat Capacity | 25.2 J K-1mol-1 | Standard Molar Entropy | 45.7 J K-1mol-1 |
| Enthalpy of Fusion | 20.9 kJ mol-1 | Enthalpy of Vapourization | 67.91 kJ mol-1 |