atomic weight

1. 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。
2. The quantity of an element whose weight in grams is numerically equal to the atomic weight of the element.
   元素的原子量以克为单位所表示的量。
3. ( physics, chemistry) not having atomic weight greater than average.
   （物理学，化学）原子量不比平均水平高。
4. The number of electrons in an atom is deduced to be approximately equal to half the atomic weight.
   原子中的电子数，将近是原子质量的一般。
5. 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。
6. 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。
7. Molecular weight: Mass of a molecule of a substance, based on12 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。
8. ( physics, chemistry) being or containing an isotope with greater than average atomic mass or weight.
   （物理学，化学）指原子质量或者原子量大于平均水平的同位素，或者含有这样的同位素。
9. Can anyone tell me the atomic weight of calcium?
   那谁能告诉我钙的原子量？
10. 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。
11. Mobile dictionary that contains information such as atomic weight, date of discovery, country of discovery etc. about all elements.
    移动字典：关于原子量，元素发现时间，在哪个国家发现等等，一切的内容都和元素有关。
12. Science has laid down the principle that the properties of an element are a periodic function of its atomic weight.
    控铺已论讲了道理，元死性量是本子量的周期函数。
13. Study on Microscale Experiment of the Determination of Copper Atomic Weight
    铜原子量测定实验的微型化研究
14. Method: The levels of calcium and magnesium of 710 ( Male 424, Female 286) children and adolescents were measured by atomic absorption spectrometry, and the data of body height and weight were obtained.
    方法：采用随机抽样方法从玉林地区检测了710例（男424，女286）7～16岁的健康青少年的身高体重指标并用偏振塞曼原子吸收仪对他们的头发样品中钙镁含量进行测定。
15. As studied by X-ray energy spectrum and atomic absorption spectrum, the cell wall of Rhizopus Oryzae contains only 0. 036% of calcium in dry weight.
    用X－ray能谱及原子吸收光谱研究，发现Ca（Ⅱ）仅占米根霉细胞壁干重的0.036%。
16. The Measurement of the Relative Atomic Weight of Magnesium Through Replacement by Using Microscale Chemical Laboratory Instruments
    用微型化学实验仪器做置换法测定镁的相对原子量
17. Research of Absolute Determination of Isotopic Abundance Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry and Determination of Samarium Atomic Weight
    MC-ICP/MS同位素丰度绝对测量方法研究与钐原子量的测定
18. This paper introduces his outstanding contributions to the determination on new values of atomic weight when he was 90 years old.
    本文介绍他在90高龄之际在原子量新值测定方面所取得的杰出成就。
19. A Calibrated Mass Spectrometric Measurement of the Atomic Weight of Europium
    校准质谱法测定铕原子量
20. Dependence of interaction cross sections of high energy cosmic ray iron nuclei ( e ≥ 3.6 agev) on atomic weight of targets
    宇宙线高能铁核（E≥3.6AGeV）作用截面对靶核原子量的依赖
21. Microscale experiment for the determination of Cu atomic weight
    测定铜原子量的微型实验
22. The mean atomic weight study of granites in eastern Qinling Mountains
    东秦岭花岗岩的平均原子量及其与成岩成矿作用的关系
23. This scoring function was composed of the atomic contact energy ( EACE), van der Waals, and electrostatic interaction energies. The weight of each term was obtained by the multiple linear regression approach.
    该函数由原子接触能（EACE）、范德华和静电相互作用能组成，通过多元线性回归方法获得各项的权重系数。
24. Contrary to electron-withdrawing groups, electron-donating groups in the phenyls of the compounds increase the fluorescence intensities, and decrease with atomic weight of halogens.
    结果表明，卟啉化合物的苯基上供电子取代基能增加卟啉的荧光强度，而吸电子取代基作用相反；荧光强度随着卟啉的苯环上取代基卤素原子量的增加而降低；
25. Determination of Atomic Weight of Cerium by Calibrated Mass Spectrometry
    用校正质谱法测量铈的原子量
26. The New International Standard of Zinc Atomic Weight
    锌原子量的国际新标准
27. By multivariate linear regression analysis method, the correlation of structural parameters was obtained from the basic property data ( H/ C atomic ratio, molecular weight, density) of residues and their fractions under ultra-critical condition.
    利用减压渣油及其超临界流体萃取分馏馏分的基本性质数据（H／C原子比、分子量、密度），由多元线性回归分析法得到了结构参数的关联式。
28. The transportation of ablated particles produced by pulsed laser ablation in ambient gas was numerically simulated via Monte Carlo method. The influences of atomic radius and atomic weight on the oscillation-stabilization time of the mixed region consisting of ablated particles and ambient gas atoms were studied.
    采用MonteCarlo方法，对脉冲激光作用下产生的烧蚀粒子在环境气体中的输运过程进行了数值模拟。
29. In recent years, with the development of science and technology, we have made further demands to the performance of atomic frequency, for example reducing size, weight, and its power consumption without sacrificing the stability of atomic frequency.
    近年来伴随着科技的发展，某些应用领域对原子频标的性能提出了新的要求，如在不牺牲原子频标稳定度的前提下，减小原子频标的体积、重量，降低其功耗等。
30. Compared with P element. B has a lower electronegativity, lower atomic weight, abundant advantages.
    过渡金属硼酸盐中B具有比P电负性更低，原子量更小，储量丰富等优点。

noun

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

   Synonym:    atomic massrelative atomic mass