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Chemical elements.com: Samarium
A site containing a good deal of elemental information. Information on each element includes atomic number, atomic mass, melting point, boiling point, density, isotopes and more.
Web Elements
Web Elements Periodic Table: Samarium
All of the elemental information that you are likely to need can be found at this extensive site, including atomic number, atomic weight, group name, standard state, properties, uses, electron configuration, typical compounds and much...