Brom
35
Br
Gruppe
17
Periode
4
Blokk
p
Protoner
Elektroner
Nøytroner
35
35
45
Generelle egenskaper
Atomnummer
35
Atomvekt
79,904
Massetall
80
Kategori
Halogener
Farge
Rød
Radioaktiv
Nei
From the Greek word bromos, stench
Krystallstruktur
Base Centered Orthorhombic
Historie
Carl Jacob Löwig discovered bromine in 1825, while still a chemistry student at Heidelberg University, Germany.
Antoine Balard distilled the bromine from a solution of seaweed ash saturated with chlorine in 1824.
He finally published his results in 1826, providing evidence that the substance he had discovered was a new element.
Antoine Balard distilled the bromine from a solution of seaweed ash saturated with chlorine in 1824.
He finally published his results in 1826, providing evidence that the substance he had discovered was a new element.
Elektroner per energinivå
2, 8, 18, 7
Elektronkonfigurasjon
[Ar] 3d10 4s2 4p5
Bromine is the only nonmetallic element that is liquid at ordinary temperatures
Fysikalske egenskaper
Fase
Væske
Tetthet
3,122 g/cm3
Smeltepunkt
265,95 K | -7,2 °C | 19,04 °F
Kokepunkt
331,95 K | 58,8 °C | 137,84 °F
Smeltevarme
5,8 kJ/mol
Fordampningsvarme
14,8 kJ/mol
Spesifikk varmekapasitet
0,474 J/g·K
Forekomst i jordskorpa
0,0003%
Forekomst i universet
7×10-7%
CAS Number
7726-95-6
PubChem CID Number
24408
Atomegenskaper
Atomradius
120 pm
Kovalent radius
120 pm
Elektronegativitet
2,96 (Pauling-skalaen)
Ioniseringsenergi
11,8138 eV
Molart volum
23,5 cm3/mol
Termisk ledningsevne
0,00122 W/cm·K
Oksidasjonstilstander
-1, 1, 3, 4, 5, 7
Bruksområder
Bromine is used in making fumigants, flameproofing agents, water purification compounds, dyes, medicines and sanitizers.
Potassium bromide is used as a source of bromide ions for the manufacture of silver bromide for photographic film.
Bromine is also used to reduce mercury pollution from coal-fired power plants.
Potassium bromide is used as a source of bromide ions for the manufacture of silver bromide for photographic film.
Bromine is also used to reduce mercury pollution from coal-fired power plants.
Bromine is poisonous and causes skin burns
Isotoper
Stabile isotoper
79Br, 81BrUstabile isotoper
67Br, 68Br, 69Br, 70Br, 71Br, 72Br, 73Br, 74Br, 75Br, 76Br, 77Br, 78Br, 80Br, 82Br, 83Br, 84Br, 85Br, 86Br, 87Br, 88Br, 89Br, 90Br, 91Br, 92Br, 93Br, 94Br, 95Br, 96Br, 97Br