Ruthenium
Links
Visual Elements: Ruthenium
http://www.chemsoc.org/viselements/pages/ruthenium.html
Image, discovery, uses, source, and physical information.
ChemicalElements.com: Ruthenium
http://www.chemicalelements.com/elements/ru.html
Basic information, atomic structure, and table of isotopes.
It's Elemental: Ruthenium
http://education.jlab.org/itselemental/ele044.html
Basic physical and historical information.
Ruthenium
http://www.scescape.net/~woods/elements/ruthenium.html
Data tables and historic information.
EnvironmentalChemistry.com: Ruthenium
http://environmentalchemistry.com/yogi/periodic/Ru.html
Atomic structure, chemical and physical properties, and table of nuclides.
WebElements: Ruthenium
http://www.webelements.com/webelements/elements/text/Ru/key.html
Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Ruthenium
http://www.wikipedia.org/wiki/Ruthenium
Properties of the element, including its history, applications, and charateristics.
Lenntech: Ruthenium
http://www.lenntech.com/Periodic-chart-elements/Ru-en.htm
Physical data, chemical properties, and health effects.