Plutonium Fact Sheet - A fact sheet about plutonium from the Waste Isolation Pilot Plant in Carlsbad, New Mexico. - http://www.wipp.energy.gov/fctshts/plutonium.pdf
ChemGlobe: Plutonium - Electronic, thermal, and steric data along with an isotope table. - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/94.html
LANL: Plutonium - Isotopes, uses, properties, and hazards. - http://periodic.lanl.gov/elements/94.html
Lenntech: Plutonium - Physical data, chemical properties, health and environmental effects. - http://www.lenntech.com/Periodic-chart-elements/Pu-en.htm
TCAEP.co.uk: Science: Periodic Table: Elements: Plutonium - A concise table of the chemical properties of plutonium. Also includes the spelling of its name in several European languages. - http://www.tcaep.co.uk/science/periodic/e/094.htm
Superconductor: Plutonium - Describes the way that scientists found a way to use plutonium as a supercondutor. - http://superconductors.org/PlutonSC.htm
EnvironmentalChemistry.com: Plutonium - Atomic structure, chemical and physical properties, and table of nuclides. - http://environmentalchemistry.com/yogi/periodic/Pu.html
Visual Elements: Plutonium - Image, general and physical information, source, uses, and key isotopes. - http://www.chemsoc.org/viselements/pages/plutonium.html
Chemical Elements.com - Plutonium (Pu) - Information on the chemical properties of plutonium, as well as its electron cloud diagram. - http://www.chemicalelements.com/elements/pu.html
Radiochemistry of Plutonium - Full text of the monograph by George H. Coleman (University of California, Lawrence Radiation Laboratory, Livermore, California). [PDF] - http://lib-www.lanl.gov/cgi-bin/getfile?rc000033.pdf
plutonium - Information about the history and properties of plutonium in paragraph form. - http://www.britannica.com/nobel/micro/472_22.html