Page 22 - Essentials of physical chemistry
P. 22
Periodic Table of the Elements
In the table on the next page, the new IUPAC format numbers the groups from 1 to 18. The previous
IUPAC numbering system and the system used by Chemical Abstracts Service (CAS) are also shown.
For radioactive elements that do not occur in nature, the mass number of the most stable isotope is
given in parentheses. Elements 113–116 and 118 have been reported but not yet confirmed.
REFERENCES
G. J. Leigh, Ed, Nomenclature of Inorganic Chemistry, Blackwell Scientific Publications, Oxford, U.K., 1990.
Chemical and Engineering News, 63(5), 27, 1985.
Atomic weights of the elements, 2007, Pure and Appl. Chem., 81, 2131, 2009.
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