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汉语拼音：yuán zǐ liàng

又称相对原子质量”。原┳拥南喽灾柿俊Ｖ敢蕴12(126c)的原子质量的1/12作标准，其他原子的质量和它相比较所得的数值。无单位，如氧原子的质量约等于┆126c原子质量的1/12的16倍，所以氧原子的原子量约等于16。绝大多数的元素都含有同位素，原子量实际上是元素所含同位素量的平均值。

• He forceast for the unknown elements their atmoic weights and all kinds of properties.

  他预言了这些未知元素的原子量和各种特性.

• They calculated as fluently with atomic weights as they did with grammes or centimetres.

  他们计算原子量就如同计算克和厘米那样娴熟.

• Atoms of the same element that differ in their atomic weight are called isotopes.

  具有不同原子量的同一种元素被称为同位素.

• Hydrogen is the lightest element with an atomic weight of 1.008.

  氢是最轻的元素,原子量为1.008.

• Who knows the atomic weight of the hydrogen atom?

  谁知道氢原子的原子量究竟是 多少 ?

• All uranium atoms do not have the same atomic weight.

  所有的铀原子并非都有相同的原子量.

• Atoms differ in atomic weights.

  各种原子的原子量是各不相同的.

• The atomic weight is a ratio quite distinct from the weight in grams.

  原子量是与以克为单位的重量完全不同的比率.

• The molecular weight of a molecule is the sum of the weights of the constituent atoms.

  一种分子的分子量就是构成它的原子成分之原子量总和.

• A hydrogen molecule consists of only two hydrogen atoms with the same atomic weight.

  氢分子仅由两个原子量相同的氢原子组成.

• The atomic numbers are nearly, but not quite the as the order of the atomic weights.

  (连接两个状语)原子序几乎是(但不完全是)和原子量的顺序相同.

• A microscale experiment using simple instrument was applied to the determination of Cu atomic weight.

  利用自制的简易气体发生器和洗气装置对铜原子量测定微型实验作了进一步的探索与实践.