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35
Br
79.904
Bromine
Halogens · Group 17 · Period 4
Atomic properties
| Atomic number | 35 |
|---|---|
| Symbol | Br |
| Standard atomic weight | 79.904 |
| Classification | Halogens |
| Group | 17 |
| Period | 4 |
| Block | p-block |
| Electron configuration | [Ar] 3d10 4s2 4p5 |
| Electronegativity (Pauling) | 2.96 |
| Common oxidation states | +5, +1, -1 |
Physical properties
| Phase at 20 °C | Liquid |
|---|---|
| Density | 3.12 g/cm³ |
| Melting point | -7.2 °C |
| Boiling point | 58.8 °C |
| Discovered | 1826 |
| CAS number | — |