查询词典 atomic mass

Isotopes have the same atomic number but different mass numbers.

同一元素的同位素有相同的原子序数不同的质量数。

It and the proton form nearly the entire mass of atomic nuclei. See table at subatomic particle

它和质子几乎构成了整个原子核的质量参见 subatomic particle

The amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles.

原子核的质量总和比粒子的总质量少。

From the beginning of 1990s, he led a research group for a long term project to determine the new values of atomic weight by using mass spectrum technique.

从1990年代初以来，他主持一个科研小组采用质谱法，实施了测定10项原子量新值的长期计划。

Formulae for the structural volume fraction of phases and the quantitative relationship between the phase amount s obtained respectively by calculations in atomic fraction and in mass fraction of elements are derived for multi-phase alloys.

导出了多相合金组成相结构体积分数以及用成分的原子分数与质量分数求得的相含量之间的关系。

The Ew of 94 neutral atoms and 109 ions were calculated by the essential parameters (mass, quantity of electricity, atomic or ionic radius and number of the outermost electrons).

较好地说明周期表中元素性质、离子性质及其周期性递变规律，可作为定量某些元素性质的基础数据，有一定的理论意义和应用价值。

Why is the relative atomic weight of 35CL smaller than its mass?

为什么35CI的相对原子质量小于它的质量数？

However, with mass-energy relation formula, the loss of helium-4 nucleus quality, equivalent to happen because of the reaction of atomic energy and reduce the release of the quality!

然而，用质能关系公式计算，氦4原子核失去的质量，恰巧等于因反应时释放出原子能而减少的质量！

In the gas-liquid phase reaction of catalytic oxidation of mesitylene by air to synthesize trimesic acid and the related process,an analysis method of reaction components was proposed,which includes chromatographic analysis,mass spectral analysis,IR spectrum,atomic absorption spectrophotometer and chemical titration for the purpose of analyzing reaction groups.

针对均三甲苯气液相催化空气氧化合成均苯三甲酸的反应及相关的工艺过程中，反应产物均苯三甲酸的分析问题，提出以色谱分析、质谱分析、红外光谱分析、原子吸收光谱分析及化学滴定为主要分析手段对反应组分进行分析，重点研究并建立了相关的分析方法。

The contents of metal elements in silk gland and silk fiber of B . mori silkworm have been detailedly analyzed by proton induced X-ray emission, inductively coupled plasma mass spectroscopy and atomic adsorption spectroscopy.

用不同的测试方法，即质子诱导X射线发射、电感耦合等离子体质谱和原子吸收光谱对桑蚕丝腺体和丝纤维中金属元素的含量进行了详细的表征。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。