atomic mass

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It has an atomic mass of two deuterium.
它的质量是等于重氢的质量。
And he was very proficient at measuring atomic mass.
他对测量原子质量很精通。
And I will go even further and will predict what its atomic mass is.
我会在深入,还会预测它的原子质量是多少。

It is a double column, You can see, it starts with hydrogen and goes to mercury in ascending order of atomic mass.
双纵栏，你们看到，从氢开始,然后到水银，按原子质量的升序排列。
麻省理工公开课 - 固态化学导论课程节选
Mendeleev is the one who taught us that the properties of the elements are a function of the atomic mass.
门捷列夫教授我们元素特性,是元素质量所起的功能。
麻省理工公开课 - 固态化学导论课程节选
That is why this says atomic number, but for most intents and purposes we can say this could be atomic mass.
那就是为什么这里说原子序数，但如果没有意图和目的,我们就说是原子质量。
麻省理工公开课 - 固态化学导论课程节选

Hans Blix, the chief of the UN inspectors, and Mohamed ElBaradei, who heads the International Atomic Energy Agency, expect their teams to start searching for any evidence of weapons of mass destruction on November 27th.
ECONOMIST: The war of words begins

the mass of a specific isotope of a particular chemical element, usually expressed in atomic mass units