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Noun

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atomic mass (countable and uncountable, plural atomic masses)

  1. The mass of an atom.
  2. (proscribed) atomic weight; the average mass of atoms of an element.

Usage notes

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Atomic mass may be measured in absolute terms, or, commonly, as a sum of the number of protons and neutrons in the nucleus.

Derived terms

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Translations

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See also

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