Rutherfordium

ChemGlobe: Rutherfordium - Electronic and thermal data along with an isotope table.
partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/104.html

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

EnvironmentalChemistry.com: Rutherfordium - Atomic structure and table of nuclides.
environmentalchemistry.com/yogi/periodic/Rf.html

It's Elemental: Rutherfordium - Basic physical and historical information.
education.jlab.org/itselemental/ele104.html

LANL: Rutherfordium - Basic information, history, and isotopes.
periodic.lanl.gov/elements/104.html

Lenntech: Rutherfordium - Physical data and chemical properties.
www.lenntech.com/Periodic-chart-elements/Rf-en.htm

Visual Elements: Rutherfordium - Physical information, key isotopes, and ionisation energies.
www.chemsoc.org/viselements/pages/rutherfordium.html