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atomic mass

/əˈtɒmɪk mæs/

翻译: 化学元素的原子质量,以原子质量单位表示。它大致等于原子中质子和中子的数量(质量数),或考虑不同同位素相对丰度后的平均数量。

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phrase

/əˈtɒmɪk mæs/C1formalscientific
  • zh化学元素的原子质量,以原子质量单位表示。它大致等于原子中质子和中子的数量(质量数),或考虑不同同位素相对丰度后的平均数量。

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.

    zh原子质量

    • 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.