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- Who knows the atomic weight of the hydrogen atom? 誰(shuí)知道氫原子的原子量究竟是多少?
- Molecular weight is expressed in the same unit as atomic weight. 分子的重量和原子的重量用相同的單位表示。
- Mol anlar weight is express in the same unit as atomic weight. 分子的重量和原子的重量用相同的單位表示。
- Hydrogen is the lightest element with an atomic weight of 1.008. 氫是最輕的元素，原子量為1.;008。（介詞省譯）
- An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of2.014. 氘氫的一種同位素，在其原子核內有一個(gè)質(zhì)子和一個(gè)中子，其原子重量為2。014
- Electrons weigh very little, so they aren't even counted in the atomic weight. 電子非常輕，因此在原子量中甚至沒(méi)有計算它。
- The atomic weight is a ratio quite distinct from the weight in grams. 原子量是與以克為單位的重量完全不同的比率。
- Molecular weights are expressed in the same units as atomic weights. 分子的重量和原子的重量用相同的單位表示。
- An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of2. 氘氫的一種同位素,在其原子核內有一個(gè)質(zhì)子和一個(gè)中子,其原子重量為2。
- An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of 2.014. 氘：氫的一種同位素，在其原子核內有一個(gè)質(zhì)子和一個(gè)中子，其原子重量為2.;014
- Mobile dictionary that contains information such as atomic weight, date of discovery, country of discovery etc. 移動(dòng)字典包含資料，如原子的重量，日期的發(fā)現，國家發(fā)現等。
- An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of 2.04. 氘：氫的一種同位素，在其原子核內有一個(gè)質(zhì)子和一個(gè)中子，其原子重量為2.;04
- Periodic table (1869): Organized array of all the chemical elements in approximately increasing order of their atomic weight. 周期表(1869):所有的化學(xué)元素按它們的原子量逐漸增加的順序有組織地排列。
- 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種類(lèi)，它們有著(zhù)相同的化學(xué)特性但是原子重量不同。
- CSIRO scientist examines a silicon sphere, similar to one that will be used to determine the exact atomic weight of kilogram. 科學(xué)家們正在重新定義質(zhì)量單位千克，在CSIRO的光學(xué)專(zhuān)家的幫助下，科學(xué)家建造了千克的新標......
- Radium, atomic number 88, atomic weight 2260254, is a natural radioelement, elements were derived from Latin, is intended to "ray. 鐳，原子序數88，原子量2260254，是一種天然放射性元素，元素名來(lái)源于拉丁文，原意是“射線(xiàn)”。
- The atomic weight of an element or the molecular weight of a compound may be specified as amu/atom (molecule) or mass/mole of material. 一種化合物中的某種元素的原子重量或分子重量可表示為物質(zhì)的原子或分子的摩爾質(zhì)量。
- 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. 結果表明,卟啉化合物的苯基上供電子取代基能增加卟啉的熒光強度,而吸電子取代基作用相反;熒光強度隨著(zhù)卟啉的苯環(huán)上取代基鹵素原子量的增加而降低;
- They calculated as fluently with atomic weights as they did with grammes or centimetres. 他們計算原子量就如同計算克和厘米那樣嫻熟。
