| Tecken | Br |
| Atomnummer | 35 |
| Grupp | 17 (Halogener) |
| Period | 4 |
| Block | p |
| Ämnesklass | Icke-metall |
| Utseende | - |
| Färg | Röd |
| Antal protoner | 35 p+ |
| Antal neutroner | 45 n0 |
| Antal elektroner | 35 e- |
| Fas vid STP | Flytande |
| Densitet | 3.1028 g/cm3 |
| Relativ atommassa | 79.901 u |
| Smältpunkt | 265.8 K -7.35 °C 18.77 °F |
| Kokpunkt | 332 K 58.85 °C 137.93 °F |
| Ångbildningsvärme | 14.725 kJ/mol |
| Elektronegativitet (Paulingskalan) | 2.96 |
| Elektronaffinitet | 324.537 kJ/mol |
| Oxidationstal | −1, +1, +3, +4, +5, +7 (a strongly acidic oxide) |
| Jonisationspotential |
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| Upptäckt och första isolation | Antoine Jérôme Balard, Carl Jacob Löwig (1825) |
Upptäckten av brom Bromine was discovered independently by two chemists, Carl Jacob Löwig and Antoine Balard, in 1825 and 1826, respectively. Löwig isolated bromine from a mineral water spring from his hometown Bad Kreuznach in 1825. Löwig used a solution of the mineral salt saturated with chlorine and extracted the bromine with diethyl ether. The publication of the results was delayed and Balard published his results first. Balard found bromine chemicals in the ash of seaweed from the salt marshes of Montpellier. The seaweed was used to produce iodine, but also contained bromine. Balard distilled the bromine from a solution of seaweed ash saturated with chlorine. The properties of the resulting substance were intermediate between those of chlorine and iodine; thus he tried to prove that the substance was iodine monochloride (ICl), but after failing to do so he was sure that he had found a new element and named it muride, derived from the Latin word muria ("brine"). | |