Brom

35
Br
Grupp
17
Period
4
Block
p
Protoner
Electrons
Neutroner
35
35
45
Generella Egenskaper
Atomnummer
35
Atommassa
79,904
Mass Number
80
Kategori
Halogener
Färg
Röd
Radioaktiv
Nej
From the Greek word bromos, stench
Kristallstruktur
Bascentrerat ortorombiskt
Historia
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.
Elektroner per skal
2, 8, 18, 7
Elektronkonfiguration
[Ar] 3d10 4s2 4p5
Br
Bromine is the only nonmetallic element that is liquid at ordinary temperatures
Fysikaliska Egenskaper
Aggregationstillstånd
Flytande
Densitet
3,122 g/cm3
Smältpunkt
265,95 K | -7,2 °C | 19,04 °F
Kokpunkt
331,95 K | 58,8 °C | 137,84 °F
Smältvärme
5,8 kJ/mol
Ångbildningsvärme
14,8 kJ/mol
Specifik värmekapacitet
0,474 J/g·K
Abundance in Earth's crust
0,0003%
Abundance in Universe
7×10-7%
Pure
Bildkrediter: Images-of-elements
Pure liquid bromine
CAS Number
7726-95-6
PubChem CID Number
24408
Atomära Egenskaper
Atomradie
120 pm
Kovalent radie
120 pm
Elektronegativitet
2,96 (Paulingskalan)
Jonisationspotential
11,8138 eV
Molvolym
23,5 cm3/mol
Värmeledningsförmåga
0,00122 W/cm·K
Oxidationstillstånd
-1, 1, 3, 4, 5, 7
Applications
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.
Bromine is poisonous and causes skin burns
Isotoper
Stabila isotoper
79Br, 81Br
Instabila 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