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35Br79.904
Bromine
Diatomic NonmetalBromine (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.
Phase: Liquid
2, 8, 18, 7
Physical Properties
Atomic Mass79.904 u
Density3.1028 g/cm³
Melting Point265.8 K
Boiling Point332 K
Period4
PhaseLiquid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
Semantic Config[Ar] 3d10 4s2 4p5
Shells2, 8, 18, 7
Electron Affinity324.537 kJ/mol
Electronegativity2.96
Ionization Energies
IE1: 1139.9 kJ/molIE2: 2103 kJ/molIE3: 3470 kJ/molIE4: 4560 kJ/molIE5: 5760 kJ/molIE6: 8550 kJ/molIE7: 9940 kJ/molIE8: 18600 kJ/mol
Discovery
Discovered byAntoine Jérôme Balard