| Element | Arsenic | Symbol | As |
| Atomic Number | 33 | Molar Mass | 74.92 gmol-1 |
| Electron Configuration | [Ar]3d104s24p3 | Normal State | solid metalloid |
| Density @STP | 5.78 g cm-3 | Melting Point | 613oC |
| Boiling Point | n/aoC | Stable Isotopes | 75As |
| Atomic Radius | 121 pm | Ionic Radius | 222 (3-) pm |
| Electronegativity (Pauling) | 2.18 | Ionization Energy (1st) | 947 kJ mol-1 |
| Ionization Energy (2nd) | 1798 kJ mol-1 | Ionization Energy (3rd) | 2735 kJ mol-1 |
| Molar Heat Capacity | 24.6 J K-1mol-1 | Standard Molar Entropy | 35.1 J K-1mol-1 |
| Enthalpy of Fusion | 27.7 kJ mol-1 | Enthalpy of Vapourization | 31.9 kJ mol-1 |