relative atomic mass

noun

1. 相对原子质量
   the average mass of all the naturally occurring atoms of a chemical element

1. Uncertainty Analysis of Absolute Measurement of Isotopic Abundances and Relative Atomic Mass
   同位素丰度绝对测量及相对原子质量测定中的不确定度评估
2. Some mass quantities and their units in mass spectrometry are introduced, including mass and weight, relative atomic mass and relative molecular mass, mass of atom and mass of molecule, atomic mass unit, unified atomic mass constant and molar mass.
   介绍并辨析质谱学中与质量相关的量和单位的含义：质量和重量，相对原子质量和相对分子质量，原子质量和分子质量，原子质量单位、原子质量常量和摩尔质量。
3. An Improvement to the Apparatus for Measuring the Relative Atomic Mass of Magnesium
   测定镁相对原子质量的装置的改进
4. Study on the numerical calculation of relative atomic mass
   相对原子质量的数值计算研究

noun

1. (chemistry) the mass of an atom of a chemical element expressed in atomic mass units

   Synonym:    atomic massatomic weight