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It's Elemental: Francium

http://education.jlab.org/itselemental/ele087.html

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ChemicalElements.com: Francium

http://www.chemicalelements.com/elements/fr.html

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WebElements: Mendelevium

http://www.webelements.com/mendelevium/

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The Free Dictionary: Mendelevium

http://www.tfd.com/mendelevium

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Encyclopedia Britanica: Mendelevium

http://www.britannica.com/EBchecked/topic/374759/mendelevium-Md

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