World Wide Web version prepared by G. P. Moss
School of Biological and Chemical Sciences, Queen Mary University of London,
Mile End Road, London, E1 4NS, UK
This version of the Periodic table is based on that recommended by the Commission on the Nomenclature of Inorganic Chemistry and published in IUPAC Nomenclature of Inorganic Chemistry, Recommendations 2005. Atomic weights are quoted to five significant figures. For more precise values see the table of 2009 recommended values (see Pure Appl. Chem., 2011, 83, 359-396). For elements with no stable nuclides the mass of the longest-lived isotope has been quoted in brackets. However three such elements (Th, Pa, and U) do have a characteristic terrestrial isotopic composition, and for these an atomic weight is tabulated. The names for elements 113 to 118 are temporary and are based on the 1978 recommendations (see Pure Appl. Chem., 1979, 51, 381-384). The names flerovium (symbol Fl) for element 114 and livermorium (symbol Lv) for element 116 have been selected.
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