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| --[[User:Ionworker|Ionworker]] 11:58, 6 Jan 2005 (CST)
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| I think a dimensionless quantity should not be called a mass.
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| Therefore ''mass number'' should be discontinued.
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| Also, nucleon number is more precisely describing what is meant.
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| Moved from front page:
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| {{Def|Nucleon Number|The [[nucleon number]] is the number of nucleons in a molecule.
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| It is a unitless physical property with symbol ''N''.
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| : ''N'' = n}}
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| == Comments ==
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| There used to be another name for the same property: the [[Mass number]].
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| This name, however, is misleading because a unitless quantity should not be called "[[Mass|mass]]".
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| The symbol for the quantity nucleon number used to be ''m'', which is even more unfortunate because ''m'' is the official symbol of a mass quantity.
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| The [[Nominal Mass|nominal mass]] ''M'' has a simillar meaning as the nuclear number, but it is not dimensionless. It is a mass measured in the [[Atomic Mass Unit]], also called [[Dalton]].
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| : ''M'' = z '''Da'''
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| where z is an integer value.
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