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单词 cation
释义

cation /'kætaɪən//'kætaɪən/

英汉-汉英词典
n. 阳离子;正离子
形容词: cationic
词组 | 习惯用语
cation exchange [化]阳离子交换
cation exchange resin 阳离子交换树脂
cation exchange capacity 阳离子交换量;阳离子交换能力
cation exchanger 阳离子交换器,阳离子交换剂
英语例句库
  1. Acids with different cation were distinguishingly different in activation energy and frequency factor distribution.
    不同阳离子的同种羧酸盐,活化能和频率因子分布却相差很大。
  2. C36CH2 cations have antiaromaticity with negative resonance energy, whereas C36CH2 anions have aromaticity with positive resonance energy.
    反之,C36CH2阴离子因共振能为正值而具有较高的芳香性和稳定性。
  3. The resultant ionized bond can be cleaved by a hemi-heterolysis process, affording a cation and a neutral radical.
    生成的离子化键能由半异裂的过程而开裂,提供一个正离子和一个中性的游离基。
  4. A method for the determination of trace cations in the tetramethylammonium chloride was developed by ion chromatography(IC) with conductivity detector.
    文章采用离子色谱法测定高浓度四甲基氯化铵中钠、钾和钙金属离子
  5. Structure of pneumatic material c lamping device and pneumatic system have been introduced with ex-pounding appli cation in a notching press.
    介绍对气动压料装置的结构及气动系统,以及气动压料装置在冲槽机上的应用。
  6. Taking the example of the homoaromaticity of cyclooctriene cation and imidazole and oxazole basicity,the essay discusses the application of resonance theory.
    文中以环辛三烯正离子的同芳香性和咪唑与恶唑的碱性为例,讨论了共振论的应用。
  7. Isobornyl ethyl ether was prepared by the catalytic ethoxylation of camphene with ethyl alcohol in the presence of cation exchange resin fixed bed.
    莰烯在阳离子交换树脂固定床催化下与乙醇反应生成异菠基乙醚。
  8. Binding energy and interaction potential of calcium cation and diazine ring are based on the calculation of all the complexes of optimized structures.
    对优化得到的稳定配合物计算了钙离子与二嗪的结合能和相互作用势.
  9. When metal-bearing solution moved along deep faults to cavities or frac tures, the metal cations reated with pyrite and organic matter and precipitated as sulfid...
    在构造减压带中,铅锌配合物交代地层中的黄铁矿或被有机质还原而沉淀富集。
  10. The synthesis of tridecane dicarboxylic acid diethyl ester with ethyl alcohol and tridecane dicarboxylic acid as reactants and cation exchange resin as catalyst had been studied.
    以强酸性阳离子交换树脂为催化剂,十三碳二元酸与乙醇为原料合成十三碳二元酸二乙酯,考察了影响反应的因素。

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原声例句
可汗学院:生物化学

The sodium, this became a cation, because it's positive.

钠,这变成了阳离子,因为它是正的。

Crash Course 综合篇

Cations are positively charged and anions are negatively charged.

阳离子带正电, 阴离子带负电。

Crash Course 综合篇

So cations only react with anions to form new compounds.

所以阳离子只与阴离子反应形成新的化合物。

Crash Course 综合篇

Silver is also a metal and is also a cation.

银也是一种金属, 也是一种阳离子

Crash Course 解剖生理学篇

But they're really just positively-charged cations — like calcium, sodium, and potassium — and negatively-charged anions, like phosphate, sulfate, and bicarbonate.

但它们实际上只是带正电荷的阳离子——比如钙、钠和钾——和带负电荷的阴离子,比如磷酸盐、硫酸盐和碳酸氢盐。

Crash Course 综合篇

And don't just think that there's one anion and one cation.

不要只是认为只有一种阴离子和一种阳离子

Crash Course 综合篇

But how do we know which ions are cations and which are anions?

但是我们怎么知道哪些离子是阳离子哪些是阴离子呢?

Crash Course 综合篇

Alkali metals want nothing more than to dump off an electron and form a positive ion, or cation.

碱金属只想释放电子并形成正离子或阳离子

Crash Course 综合篇

Now, when we name ionic compounds, we just say the cation first, and the anion second.

现在,当我们命名离子化合物时, 我们只是先说阳离子, 然后再说阴离子。

Crash Course 综合篇

But the names of these ions change somewhat depending on whether they are cations or anions.

但是这些离子的名称会根据它们是阳离子还是阴离子而有所不同。

中文百科

离子 Ion

(重定向自Cation)
离子也是构成化学结构的基本粒子
伽凡尼电池

离子是指原子由于自身或外界的作用而失去或得到一个或几个电子使其达到最外层电子数为8个(如第一层是最外层,则为7个,若是氢离子,则没有外层电子)的稳定结构。这一过程称为电离。电离过程所需或放出的能量称为电离能

在化学反应中,金属元素原子失去最外层电子,非金属原子得到电子,从而使参加反应的原子或原子团带上电荷。带电荷的原子叫做离子,带正电荷的原子叫做阳离子,带负电荷的原子叫做阴离子。阴、阳离子由于静电作用而形成不带电性的化合物。

与分子、原子一样,离子也是构成物质的基本粒子。如氯化钠就是由氯离子和钠离子构成的。

英语百科

Ion 离子

(重定向自Cation)
Hydrogen atom (center) contains a single proton and a single electron.  Removal of the electron gives a cation (left), whereas addition of an electron gives an anion (right).  The hydrogen anion, with its loosely held two-electron cloud, has a larger radius than the neutral atom, which in turn is much larger than the bare proton of the cation. Hydrogen forms the only cation that has no electrons, but even cations that (unlike hydrogen) still retain one or more electrons are still smaller than the neutral atoms or molecules from which they are derived.
Schematic of an ion chamber, showing drift of ions. Electrons drift faster than positive ions due to their much smaller mass.[2]
Avalanche effect between two electrodes. The original ionisation event liberates one electron, and each subsequent collision liberates a further electron, so two electrons emerge from each collision: the ionising electron and the liberated electron.
Mixed Roman numerals and charge notations for the uranyl ion. The oxidation state of the metal is shown as superscripted Roman numerals, whereas the charge of the entire complex is shown by the angle symbol together with the magnitude and sign of the net charge.

An ion (/ˈən, -ɒn/) is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge. Ions can be created, by either chemical or physical means, via ionization.

近义、反义、联想词
近义词
n.
ion

联想词
ion离子;chloride氯化物;ionic离子的;ligand配合基;hydroxide氢氧化物;alkali碱;adsorption吸附;atom原子;ligands配体;ammonium铵;proton质子;
英英词典
cation n.
  1. a positively charged ion
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