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atomic mass

/əˈtɒmɪk mæs/

1 entry

phrase

/əˈtɒmɪk mæs/C1formalscientific
  • ruМасса атома химического элемента, выраженная в атомных единицах массы. Она примерно эквивалентна числу протонов и нейтронов в атоме (массовому числу) или среднему числу с учётом относительного содержания различных изотопов.

The mass of an atom of a chemical element, expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

  1. B2formal

    The mass of an atom, typically expressed in atomic mass units (amu), which is approximately equal to the total number of protons and neutrons in the atom's nucleus.

    ruМасса атома

    • The atomic mass of carbon is approximately 12.01 amu.
    • Scientists calculate atomic mass by averaging the masses of an element's isotopes.
    • The periodic table lists the atomic mass of each element below its symbol.