With six protons and six neutrons, carbon normally has an atomic number of 12.
具备6个质子和6个中子，碳原子数通常为12。
The radioactive carbon atoms weigh 14 atomic units, whereas run-of-the-mill ones weigh 12 units.
这种放射性的碳原子为14原子单位，而普通碳原子为12原子单位。
Repeatability and reproducibility of carbon in low-alloy steel analyzed by spark source atomic emission spectrometry are studied.
研究了火花源原子发射光谱仪分析低合金钢中碳的重复性和再现性。
The surface of primary particle of CB consists of randomly ranged fine graphite-like crystals with Fullerene structure carbon, and shows rough atomic steps' morphology.
炭黑原生粒子表面由细小的石墨状晶体无规排列构成，并存在富勒结构碳，呈凹凸不平的原子台阶形貌。
All methods are primarily based on the generation of large amounts of atomic hydrogen and carbon radicals.
所有的方法首先要以大量原子态氢和碳基的产生为基础。
E. g. : instrument processing and cutting of metal signs, ironing boards, atomic stamps, carbon plate in battery, copper stamp and small artworks.
如：仪器加工，金属标牌、烫金板、原子章、电池碳板、铜章、小型工艺元件切割等；
Therefore, it is regarded that the formation of atomic lead is mainly dependent on the thermal dissociation of lead oxide and the reduction of lead oxide by carbon is slower.
从而认为铅原子的形成主要靠气态氧化铅的热解，而碳还原反应则是缓慢的。
Molecular dynamics simulations are performed to study the growth of diamond_like carbon (DLC) films on the atomic scale.
利用分子动力学模拟方法，从原子尺度上研究了类金刚石（DLC）薄膜生长过程。
This paper discusses the atomic structure of carbon nanotube and analyses the influence of chiral on the characteristics of carbon nanotube.
本文讨论了碳纳米管的原子结构，分析了其结构对碳纳米管性能的影响。
The contents of elements K, Na, ca, Mg in carbon fibre were determined by atomic absorption spectrophotometry.
碳纤维中的钾、钠、钙、镁元素的含量可用原子吸收分光光度法来测定。
The average mass of an atom of an element, usually expressed relative to the mass of carbon 2, which is assigned 2 atomic mass units.
一种元素中原子的平均重量，通常相对碳2的重量来表示，碳2的重量定为十二个原子量单位。
The average mass of an atom of an element, usually expressed relative to the mass of carbon 12, which is assigned 12 atomic mass units.
一种元素中原子的平均重量，通常相对碳12的重量来表示，碳12的重量定为十二个原子量单位。
A naturally radioactive carbon isotope with atomic mass 4 and half-life 5,780 years, used in determining the age of ancient organic, geologic, or archaeological specimens.
一种碳的天然放射性同位素，原子量为4，半衰期为5，780年，用于测定古代生物标本，地质标本或考古遗迹的标本的年代。
The atomic bonds between carbon and other atoms absorb infra red radiation.
碳与其他原子连接的原子键吸收红外线。
The results showed that oxygen to carbon atomic ratios gradually increased and the valence states of carbon markedly changed during the ozone bleaching of oxygen-delignified birch kraft pulp.
结果表明，氧脱木素桦木硫酸盐浆臭氧漂白期间氧碳比逐渐增加，碳价态发生了显著变化。
The model includes complete atomic balances, detailed equipment options and extensive pre-built kinetic parameters for the main carbon reactions and necessary options to model product distributions.
本模型包含了完整的原子平衡，详细的设备选项，及预先建立的有关碳元素的主要化学反应的广泛的动力学参数和模拟产品分布的必要选项。
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。
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。
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