Difference between revisions of "Mass number"

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{{DefName|The sum of the protons and neutrons in an atom, molecule or ion.}}
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{{Def2|The sum of the protons and neutrons in an atom, molecule or ion.}}
  
  

Revision as of 20:17, 3 August 2006

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Gold Book Entry

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.

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