Electrons weigh very little, so they aren't even counted in the atomic weight.
电子非常轻，因此在原子量中甚至没有计算它。
All uranium atoms do not have the same atomic weight.
并非所有的铀原子都有相同的原子量。
Electrons weigh very little, so they are n't even counted in the atomic weight.
电子非常轻，因此在原子量中甚至没有计算它。
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。
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。
An arrangement of 56 elements in order of ascending atomic weight made by Newlands in 1863.
1863年，纽兰茨所作。他将56种元素按原子量上升次序排列。
The molecular weight of a molecule is the sum of the atomic 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。
Molecular weight: Mass of a molecule of a substance, Based on 12 as the atomic weight of carbon-12.
分子量：物质的分子质量，依据的事实是1莫耳的碳-12的质量是12克。
Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.
原子序数18，原子量39。948，是一种稀有气体。1894年由英国化学家瑞利和拉姆赛发现。
Isotopes are different varieties of the same element, which have identical chemical properties but differ in atomic weight.
同位素是同一元素的不同种类，它们有着相同的化学特性但是原子重量不同。
Periodic table (1869) : Organized array of all the chemical elements in approximately increasing order of their atomic weight.
周期表(1869)：所有的化学元素按它们的原子量逐渐增加的顺序有组织地排列。
However, you also want to include the name, symbol, atomic number, and atomic weight; you can select each of these by using an.
不过，我们还希望填充一些元素名、元素符号、元素号和原子量，可以在模板中使用。
Abstract It was commented on significant figures of mole mass of Zinc Oxide and relative atomic weight in calibrating for EDTA standard volumetric solution in GB/T 601–2002.
标准滴定溶液的标定是其浓度的量值溯源，GB／T 601–2002［1］通过规定工作基准试剂摩尔质量的有效数字，减少因数字修约而引入的不确定度。
A dictionary that contains information such as atomic mass, weight, date of discovery etc. about all elements.
一本关于化学的字典。包含信息譬如原子质量、重量，发现日期等关于所有元素的字典。
The results show that the surface damage, the weight loss and the leakage rate of an O-ring all increase in proportion to its of the time exposed to atomic oxygen.
暴露时间越长，表面形貌受到的损坏越严重、质量减少量越多，泄漏率也就越大。
The results show that the surface damage, the weight loss and the leakage rate of an O-ring all increase in proportion to its of the time exposed to atomic oxygen.
暴露时间越长，表面形貌受到的损坏越严重、质量减少量越多，泄漏率也就越大。
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