Carbon

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

Carbon and Life - The properties of the many forms of carbon and their importance in life, fuels and emissions.
http://oolong.co.uk/carbon.htm

ChemicalElements.com: Carbon - Basic information, atomic structure, and table of isotopes.
http://www.chemicalelements.com/elements/c.html

Symbol C - A resource for information on the carbon element - useful for school-related projects.
http://www.freewebs.com/symbolc/

ChemGlobe: Carbon - Electronic, thermal, and steric data along with basic information.
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/6.html

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

The Chemistry of Carbon - Diagrams and VRML models of the element.
http://www.nyu.edu/pages/mathmol/modules/carbon/carbon1.html

LANL: Carbon - History, forms, compounds, and isotopes.
http://periodic.lanl.gov/elements/6.html

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

It's Elemental: Carbon - Basic physical and historical information.
http://education.jlab.org/itselemental/ele006.html

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

Visual Elements: Carbon - Image, animation, source, general information, and key isotopes.
http://www.chemsoc.org/viselements/pages/carbon.html