35 - Bromine diatomic nonmetal
Discovered by Antoine Balard in 1826
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.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 7 | 2 in 4s + 5 in 4p |
Electron shells
79.9 u Atomic Mass
1.15 Å Atomic Radius
332 K Boiling Point
17 Group
-1, 1, 3, 5 Common Oxidation States
1.2 Å Covalent Radius
3.1 g/cm³ Density
325 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5 Electron Configuration
[Ar] 3d10 4s2 4p5 Electron Configuration (semantic)
2.96 Electronegativity
35 Electrons
11.8 eV First Ionization Energy
-1, 5 ICSD Oxidation States
1139.9, 2103, 3470, 4560, 5760, 8550, 9940, 18600 kJ/mol Ionization Energies
266 K Melting Point
98 Mendeleev Number
4 Number of Shells
7 Electron Valency
45 Neutrons
35 Atomic Number
19 Number of Isotopes
-1, 1, 3, 4, 5, 7 Oxidation States
4 Period
Liquid Phase
35 Protons
2, 8, 18, 7 Electron Shell Occupations
0.474 J/(g K) Specific Heat