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2. Quantities defining atoms and elements
2.1 Name and symbol
Most of these symbols have long since been adopted, except for recently-discovered unstable elements, for which IUPAC proposes a systematic nomenclature. This nomenclature is backed up by a 3-letter symbolism (one capital and two small letters). Each digit (from 0 to 9) of the atomic number units is assigned a letter (0 = N for Nil, 1 = U for Un...). Element 103 is thus assigned the symbol Unt and the name unniltrium, while the last known element (Z = 118) is given the name ununoctium, and its symbol is Uuo. In addition to the 3-letter symbol, elements from Z = 104 to 112 have been given names and thus chemical symbols, following a 2002 IUPAC recommendation to name new elements after "a mythological concept, a place, a country, a property or a scientist". These...
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Quantities defining atoms and elements
Bibliography
Websites
IUPAC periodic table http://old.iupac.org/reports/periodic_table/IUPAC_Periodic_Table-21Jan11.pdf
IUPAC chemical elements http://old.iupac.org/general/FAQs/elements.html#pt
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The Ultimate Scientific and Technical Reference