Scandium

ChemGlobe: Scandium - Electronic, thermal, and steric data along with an isotope table.
partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/21.html

ChemicalElements.com: Scandium - Basic information, atomic structure, and isotopes.
www.chemicalelements.com/elements/sc.html

Discovery of Scandium - Article by Lars Fredrick Nilson.
dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Disc-of-Scandium.html

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

It's Elemental: Scandium - Basic physical and historical information.
education.jlab.org/itselemental/ele021.html

LANL: Scandium - History, sources, properties, costs, and uses.
periodic.lanl.gov/elements/21.html

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

Visual Elements: Scandium - Image, animation, sources, use, physical information, and ionisation energies.
www.chemsoc.org/viselements/pages/scandium.html

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