Difference between revisions of "Mass number"

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{{Def2|The sum of the protons and neutrons in an atom, molecule or ion.}}
 
{{Def2|The sum of the protons and neutrons in an atom, molecule or ion.}}
  
== Orange Book term ==
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Sum of the numbers of protons and neutrons in an atom, molecule or ion. Equivalent to nominal mass.
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#[[Gold Book]]
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#[[Orange Book]]
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Revision as of 03:03, 3 June 2010

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Orange Book

ORANGE BOOK DEFINITION

IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979.

Mass number
IUPAC 1997 Orange Book Chapter 12
Index of Orange Book Terms


Gold Book

GOLD BOOK DEFINITION

IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997).

Mass number

Mass Number

Total number of heavy particles (protons and neutrons jointly called nucleons) in the atomic nucleus. Also called nucleon number. Symbol m in mass spectrometry.

Source:

Green Book, p. 20

Red Book, p. 35

PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 980

PAC, 1991, 63, 1541 (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1545

IUPAC Gold Book
Index of Gold Book Terms


See also

External links