35Br79.90
Bromine
Halogen
Liquid at STP
Period 4Group 17Block PDiscovered 1826
[Ar]4s2 3d10 4p5
Bromine (from Ancient Greek:βρῶμος, brómos, meaning "stench") is a chemical element with symbol Br, and atomic number 35. It is a halogen. The element was isolated independently by two chemists, Carl Jacob Löwig and Antoine Jerome Balard, in 1825–1826.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 35 |
| Atomic Mass | 79.90 u |
| Electron Configuration | [Ar]4s2 3d10 4p5 |
| Oxidation States | +5, +1, -1 |
| Electronegativity | 2.96 (Pauling) |
| Atomic Radius | 183 pm |
| Ionization Energy | 11.814 eV |
| Electron Affinity | 3.365 eV |
| Block | P |
Physical Properties
| Standard State | Liquid |
| Melting Point | 265.95 K (-7.2 °C) |
| Boiling Point | 331.95 K (58.8 °C) |
| Density | 3.11 g/cm³ |
| CPK Color | #A62929 |
Classification
| Category | Halogen |
| Group Block | Halogen |
| Period | 4 |
| Group | 17 |
| Block | P |
Discovery
| Year Discovered | 1826 |
| Discovered By | Antoine Jérôme Balard |
| Electron Shells | 2, 8, 18, 7 |