Zinc

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

Visual Elements: Zinc - Image, animation, physical information, and key isotopes.
http://www.chemsoc.org/viselements/pages/zinc.html

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

LANL: Zinc - History, sources, properties, and uses.
http://periodic.lanl.gov/elements/30.html

It's Elemental: Zinc - Basic physical and historical information.
http://education.jlab.org/itselemental/ele030.html

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

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

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

ChemGlobe: Zinc - Electronic, thermal, and steric data along with an isotope table.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/30.html

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