ตำรายาของประเทศไทย
Thai Pharmacopoeia
สำนักยาและวัตถุเสพติด กรมวิทยาศาสตร์การแพทย์ กระทรวงสาธารณสุข
Bureau of Drug and Narcotic, Department of Medical Sciences, Ministry of Public Health1.13 NAMES, SYMBOLS AND ATOMIC WEIGHTS OF ELEMENTS
[Scaled to Ar (12C) = 12, where 12C is a neutral atom in its nuclear and electronic ground state.]
The atomic weights have been revised in accordance with the figures recommended by IUPAC1 . Elements that lack a characteristic terrestrial isotopic composition have not been included in this table. The standard values of atomic weights and the uncertainties (in parentheses, following the last significant figure to which they are attributed) are given.
1 From M. E. Wieser, Atomic weights of the elements 2005 (IUPAC Technical Report), Pure Appl. Chem., 2006, 78(11), pp. 2054-2056.