35Br79.904
Diatomic Non-Metalp-block
Bromine
Element 35 on the periodic table, symbol Br, group 17, period 4.
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.
Properties
- Atomic Number
- 35
- Atomic Mass
- 79.9040 u
- Group
- 17
- Period
- 4
- Block
- p-block
- Category
- Diatomic Non-Metal
- State at 25 °C
- Liquid
- Melting Point
- 265.8 K · -7.3 °C
- Boiling Point
- 332 K · 58.9 °C
- Density
- 3.1028 g/cm³
- Atomic Radius
- 115 pm
- Electronegativity
- 2.96
- Oxidation States
- -1, +1, +3, +5
- Abundance in Crust
- 2.4 mg/kg
- Discovered
- 1826
- Discovered By
- Antoine Jérôme Balard
Electron Configuration
[Ar] 3d10 4s2 4p5
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
Ionisation Energies (kJ/mol)
- 1. 1,139.9
- 2. 2,103
- 3. 3,470
- 4. 4,560
- 5. 5,760
- 6. 8,550
- 7. 9,940
- 8. 18,600
Elements near Bromine
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.