The purpose of this standard is to give, in table form, the quantities and units of physical chemis ry and molecular physics. When two symbols are given for the same quantity without special dis inction, they can be used indifferently. SI units are given in bold; other units are given in common characters. The abbreviations "nI, de, en" mean "Dutch, German, Englis " respectively (is 639:1988). The definitions of the units are given in the NBN X 02-001 standard. Special remarks In this standard, the symbols of the constituents are indicated in lower indices, for example cB, The upper index * means "pure". The upper index means "reference". If the constituent symbol is complex, it should be placed in parentheses on the same line as the main symbol, for example c(H2S04). The names and symbols of chemical elements are given in appendix A. The symbols of chemical elements and nuclides are given in appendix B. Appendix C gives the definition of pH.
NBN X 02-108-1989 history
1989NBN X 02-108-1989 Quantifies and units of physical chemistry and molecular physics