mass number

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Noun

mass number (plural mass numbers)

1. (physics, physical chemistry) The total number of protons and neutrons in an atomic nucleus. Symbol: A

Synonyms

• atomic mass number
• nucleon number

Related terms

• atomic number
• atomic weight
• atomic mass
• atomic mass unit

Translations

• French: nombre de masse
• Italian: numero di massa
• Portuguese: número de massa
• Russian: массовое число
• Spanish: número másico, número de masa

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