Bromine

It's Elemental: Bromine - Basic physical and historical information.
http://education.jlab.org/itselemental/ele035.html

Wikipedia: Bromine - Properties of the element, including its history, applications, and characteristics.
http://en.wikipedia.org/wiki/Bromine

USGS Minerals Information: Bromine - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
http://minerals.usgs.gov/minerals/pubs/commodity/bromine/

WebElements: Bromine - Extensive information on history, uses, occurrence, compounds, and properties of the element.
http://www.webelements.com/webelements/elements/text/Br/key.html

ChemGlobe: Bromine - Electronic, thermal, and steric data along with an isotope table.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/35.html

ChemicalElements.com: Bromine - Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/br.html

EnvironmentalChemistry.com: Bromine - Atomic structure, chemical and physical properties, and table of nuclides.
http://environmentalchemistry.com/yogi/periodic/Br.html

Visual Elements: Bromine - Source, uses, general and physical information, and key isotopes.
http://www.chemsoc.org/viselements/pages/bromine.html

Lenntech: Bromine - Physical data, chemical properties, health and environmental effects.
http://www.lenntech.com/Periodic-chart-elements/Br-en.htm

LANL: Bromine - History, properties, uses, and production.
http://periodic.lanl.gov/elements/35.html