应用化学专业英语第二版万有志主编版(课后答案和课文翻译)

called a covenlent bond.

分子是通过共用电子对将两个分离的原子结合在一起。通过共用电子对形成的键称为共价键。

A chlorine atom will pick up an extra electron from anything willing to give one up.

氯原子可以从任何愿意失去一个电子的原子处得到一个电子。

But, again, what if the only thing around is another chlorine atom?

但是,如果周围只有另一个氯原子又会怎样?

Chlorine atoms, too, can attain a more stable arrangement by sharing a pair of electrons.

氯原子同样也是通过共用电子对达到稳定结构。

Each chlorine atom in the chlorine molecule counts eight electrons around itself and concludes that it has an arrangement like that of the noble gas argon.

that it has an arrangement like that of the noble gas argon.宾语从句

氯分子中每个氯原子周围都有8个电子,并且可以断定它具有惰性气体氩一样的排布。

The shared pair of electrons in the chlorine molecule also creates a covalent bond.

氯分子中共用的一对电子同样形成共价键。

For simplicity, the hydrogen molecule is often represented as H2 and the chlorine molecule as Cl2.

the chlorine molecule as Cl2:the chlorine molecule is often represented as Cl2

为了简化,氢分子常写成H2,氯分子常写成Cl2。 The subscripts indicate two atoms per molecule. 这个下标表示每个分子中有2个原子。

In each case, the covalent bond between the atoms is understood. Sometimes the covalent bond is indicated by a dash, H-H and Cl-Cl. 在每种情况下,原子之间的共价键都可以理解,有时共价键也用一个短线表示H-H和Cl-Cl。:

Let us be sure we understand the meaning of numbers in formulas.

让我们确信我们理解公式中数字的意义。

Take a moment to establish in your mind the difference among the following: H,H2,2H,2 H2,H2O,2 H2O.

花点时间来搞清楚下面数字的不同:H,H2,2H,2 H2,H2O,2 H2O。

Is it clear to you that although H represents a single atom of hydrogen, H2 implies two atoms of H bonded together, whereas 2H represents two separate, free, and independent atoms of H?

That引导实际主语

你是否明白H代表分离的氢原子,

>>展开全文<<
12@gma联系客服:779662525#qq.com(#替换为@) 苏ICP备20003344号-4