Element: Bromine (Br)

Element (Atom) NameBromine
Physical state at room temperatureLiquid
Element ClassificationNon-metal
Group NameHalogen
Period Number (Periodic table) 4
Group number (Periodic table)17
Atomic number35
Atomic weight79.904 (Ref: Jlab-ele035)
79.90 (Ref: Lanl-35)
[79.901, 79.907] (Ciaaw-bromine, Nist-35)
Atomic Radius183 pm (Van der Waals) (Ref: Lanl-35)
Density3.11 g/cm3 (Ref: Jlab-ele035)
Melting point-7.2°C (Ref: Jlab-ele035, Lanl-35)
Boiling point58.8°C (Ref: Jlab-ele035, Lanl-35)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d10 
4s2 4p5
Oxidation States+5, +1, -1 (Ref: Jlab-ele035)
5, 4, 3, 1, −1 ​(a strongly acidic oxide) (Ref: Lanl-35)
Ionization Energy11.814 eV (Ref: Jlab-ele035)
11.81381  eV (Ref: Nist-35)
Number of Stable Isotopes2
InChIInChI=1S/Br (Pubchem-35)


  • Jlab-ele035: https://education.jlab.org/itselemental/ele035.html
  • Lanl-35: https://periodic.lanl.gov/35.shtml
  • Ciaaw-bromine : https://www.ciaaw.org/bromine.htm
  • Nist-35 : https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=35
  • Pubchem-35: https://pubchem.ncbi.nlm.nih.gov/element/35
  • science.co.il: https://www.science.co.il/elements/

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