1.
The number of atoms in a molecule.
原子数，原子价，化合价单质分子中的原子数
2.
Having a valence of5.
五价的有五个原子价的
3.
(chemistry) having a valence of five.
（化学）有五个原子价的。
4.
(chemistry) having a valence of two or having two valences.
（化学）有二个原子价之一的，或有两个原子价的。
5.
The combining capacity of an atom or a radical determined by the number of electrons that it will lose, add, or share when it reacts with other atoms.
化合价，原子价原子或原子团与其它原子反映时由所失、增加成共享的电子数目决定的化合能力
6.
A simple and useful characterization of the outer electrons in an atom is the idea of valence.
对原子外层电子的简单而有用的描述是原子价的概念。
7.
A reaction in which the atoms in an element lose electrons and the valence of the element is correspondingly increased.
氧化一种某个元素的原子失去电子后它的原子价相应增加的反应
8.
The hydrocarbon radical, C6H13, having valence1.
己基碳氢化合物基，C6H13，原子价为1
9.
of or relating to or characterized by covalence.
属于、关于或具有共有原子价特点。
10.
A divalent atom or radical.
二价原子二价的原子或基
11.
The valence atom of an alkali-metal atom has two states.
碱金属原子的价原子具有两种能态。
12.
This ten-dollar hat is now on sale for five.
帽子大减价，原价10 美元，现价5 美元。
13.
(chemistry) having a valence of three.
（化学）有三价原子的。
14.
(chemistry) haveing a valence of four.
（化学）有四价原子的。
15.
Every carbon atom has four bonds.
每个碳原子的价键为四。
16.
A valence elect ron can move away f rom it satom, leaving it a hole.
价电子能够脱离其原子给原子留下一个空穴。
17.
Each of the four valency electrons of the carbon atom is shared with one of a hydrogen atom.
碳原子的四个价电子都各与氢原子的一个价电子共用。
18.
The atom that contributes no electrons to a covalent bond.
受体没有给共价键提供电子的原子