bromine (Br)
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Bromine. Credit: RTC, Wikipedia
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A heavy, volatile, corrosive, reddish-brown, nonmetallic liquid element (see nonmetal), having a pungent and highly irritating vapor. Bromine is one of the halogens, and has properties intermediate between those of chlorine and iodine. It occurs as bromides, mainly in seawater, from which it is extracted by oxidation with chlorine.
Soluble metal bromides (see halides) are used as sedatives; silver bromide, being light-sensitive, is used in photography. Ethylene dibromide, the chief bromine product, is used as a lead scavenger in antiknock additives. Alkyl bromides (see alkyl halides are used as fumigants and solvents.
| 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 |
Related category
INORGANIC CHEMISTRY
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