As
Arsenic
Element 33 · Metalloid · Period 4, Group 15
Solid · Discovered Ancient
Atomic Properties
| Atomic Number | 33 |
| Atomic Mass | 74.92159u |
| Electron Configuration | [Ar]4s2 3d10 4p3 |
| Electronegativity | 2.18Pauling |
| Atomic Radius | 185pm |
| Ionization Energy | 9.815eV |
| Electron Affinity | 0.81eV |
| Oxidation States | +5, +3, -3 |
Physical Properties
| Standard State | Solid |
| Melting Point | 1090K |
| Boiling Point | 887K |
| Density | 5.776g/cm³ |
| Group Block | Metalloid |
| Year Discovered | Ancient |