atomic mass

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English[edit]

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Noun[edit]

atomic mass ‎(plural atomic masses)

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

Translations[edit]

Usage notes[edit]

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

See also[edit]