Arsenic |
| Symbol | As |
|---|---|
| Latin name | Arsenicum |
| Atomic number | 33 |
| Period | 4 |
| Element category | Metalloids |
| Relative atomic mass | 74.92159 |
| Group | V.A |
| Electronegativity | 2.0 |
| Oxidation numbers | -3, 3, 5 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3 |
| Density [g/cm3] | 4.7 |
| State | Solid |
| Melting point [°C] | 817 |
| Boiling point [°C] | 613 |
| Atomic radius [pm] | 114 |
| Covalent radius [pm] | 119 |
| Thermal conductivity [W m-1K-1] | 50 |
| Heat capacity [J K-1g-1] | 0.33 |
| Discovery | 1250 |
| Hardness [Mohs scale] | 3.5 |
| Brinell hardness [MPa] | 1440 |
| Young's modulus [GPa] | 8 |
| Electrical conductivity [S m-1] | 3.3 · 106 |
| 1.st ionization energy [eV] | 9.8152 |
| 2.nd ionization energy [eV] | 18.633 |
| 3.rd ionization energy [eV] | 28.351 |
| Stable isotopes | 1 |
| Unstable isotopes | 13 |