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Bromine (Br)
Atomic number: 35 · Category: diatomic nonmetal · Group 17 · Period 4 · Phase: Liquid
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.
Block: p
CPK color:#a62929
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
Configuration (semantic): [Ar] 3d10 4s2 4p5
Shells: 2, 8, 18, 7
Electronegativity (Pauling): 2.96
Electron affinity: 324.537
Ionization energies: 1139.9, 2103, 3470, 4560, 5760, 8550, 9940, 18600
Periodic position
Group: 17
Period: 4
xpos: 17
ypos: 4
Spectral/Bohr images
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