SymbolBr
Latin nameBromum
Atomic number35
Period4
Element categoryHalogens
Relative atomic mass79.904
GroupVII.A
Electronegativity
2.8
Oxidation numbers
-1, 1, 3, 5, 7
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5
Density [g/cm3]
3.123
State
Liquid
Melting point [°C]
-7.25
Boiling point [°C]
58.78
Critical point [°C]
315
Critical pressure [MPa]
10.34
Atomic radius [pm]
94
Covalent radius [pm]
114
Thermal conductivity [W m-1K-1]
0.122
Heat capacity [J K-1g-1]
0.226
Discovery
1826
Electrical conductivity [S m-1]
1 · 10-10
1.st ionization energy [eV]
11.8138
2.nd ionization energy [eV]
21.8
3.rd ionization energy [eV]
36.0
Stable isotopes
2
Unstable isotopes
16