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    bromine (Br)

    bromine
    Bromine. Credit: RTC, Wikipedia
    A heavy, volatile, corrosive, reddish-brown, nonmetallic liquid element, having a highly irritating vapor. Bromine is one of the halogens. It is used in producing petrol antiknock mixtures, fumigants, dyes, and photographic chemicals.


    atomic number 35
    relative atomic mass 79.904
    electron configuration 1s22s22p63s23p64s23d104p5
    first ionization energy 1,140 kJ/mol
    electronegativity 3.0
    atomic radius 114 pm
    melting point -7.2 °C (19.0 °F)
    boiling point 58.78 °C (137.8 °F)
    relative density 3.119



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