Br
Bromine
Z 35 79.904 g/molHalogen
Nucleus
35 Protons
45 Neutrons
35 Electrons (7 Valence)
Shell distribution: K2 • L8 • M18 • N7 • O0 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Ar]3d104s24p5
Oxidation States
CommonRare
0
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Radii
Empirical
115 pm1.15 Å
Calculated
94 pm0.94 Å
Covalent
120±3 pm1.2±0.03 Å
Van der Waals
183 pm1.83 Å
IonicBr-
196 pm1.96 Å
Crystal Structure
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Orthorhombic
Pearson symbol
oS8
Space group
Cmce No. 64