atomic weight

Determination of Atomic Weight of Cerium by Calibrated Mass Spectrometry

用校正质谱法测量铈的原子量

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.

Who knows the atomic weight of the hydrogen atom?

谁知道氢原子的原子量究竟是 多少 ?

The New International Standard of Zinc Atomic Weight

锌原子量的国际新标准

Microscale experiment for the determination of Cu atomic weight

测定铜原子量的微型实验

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。

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

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。

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。

( 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。

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

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。

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。

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；

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。

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。

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

( physics, chemistry) not having atomic weight greater than average.

（物理学，化学）原子量不比平均水平高。

Can anyone tell me the atomic weight of calcium?

那谁能告诉我钙的原子量？

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

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.

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.

A Calibrated Mass Spectrometric Measurement of the Atomic Weight of Europium

校准质谱法测定铕原子量

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。

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

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.

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.

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.

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。

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。