那么，我们可以说--如果我们这里有氖原子,而我们想知道与它等电子的是什么，负一价的氟离子就是与它等电子的，我们还有氧-,氧应该是几价的？
So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be?
而对于氟来说，氟原子更小,与外部壳层在这的负一价氟离子相比。
Whereas for fluorine, fluorine is smaller than f minus is the one that's the outer shell shown here.
那么让我们来想一想，拿走一个，2,s，电子所消耗的能量，假设一个是从正一价硼离子中拿走1，另一个是从中性硼原子中拿走。
So let's think about the energy required now to remove a 2 s electron, let's say we're removing it from boron plus 1 versus neutral boron.
我们可以用，X，来表示一个任意的原子或离子，因此可以写成，X，加一个电子等于负一价的。
We can write out what it is for any certain atom or ion x, X so it's just x plus an electron gives us x minus.
电价：在原子间形成离子键的过程中，由电子从一种元素的原子转移到另一种元素的原子所表示的价。
Electrovalence: valence characterized by the transfer of electrons from atoms of one element to atoms of another during the formation of an ionic bond between the atoms.
这个分子包含四个呈环状排列的碳原子，每两个碳原子之间形成一个三价键。
The molecule contains four carbon atoms arranged in a ring with a triple bond between two of them.
卤原子在它们的价电子层含有七个电子，因此是一价的。
Halogen atoms contain seven electrons in their valence shell, and, consequently, are monovalent.
三碱式的每个分子中含有三个一价碱性原子或原子团的。
Containing three univalent basic atoms or radicals per molecule. Used of a base or salt.
再根据原子库波形中的原子位移和相位这一等价条件，将原子库划分为不等价的原子库集合，从而又减少了原子库中原子的存储和计算量。
Though the equivalent condition of the transfer and phase of the atoms in dictionary, the set will be divided into the unequal set of the atoms, that reduce the size of the storage of the atoms again.
判据指出，一切氧化物超导体的原子价层轨道平均能的平均值都在- 12。
The criterion shows that the average values of average energy of valence orbits of atom of all the oxide superconductors concentrate in a narrow range from -12.
这是一张对比图，展示某些离子与它们的母体，比如，这里是锂，大家可以看到正一价锂离子是多么的小，与中性锂原子相比。
And this is just a picture showing some of these sizes with their parent. So, for example, a lithium here, you can see how lithium plus is smaller than the actual lithium atom in its neutral state.
加上钪和钇，一起组成稀土金属。它们的原子都有相似的配置，以及相似的物理和化学行为，最常见的原子价是3和4。
With scandium and yttrium they make up the rare earth metals. their atoms have similar configurations and similar physical and chemical behaviour; the most common valences are3and4
它们的化合价都是1。它们各有一个电子可借给其他原子。
Each has a combining power of one. They each have one electron to lend to anther atom.
元素的特征价数是以该元素一个原子可结合的氢原子数或可从一化合物中置换出的氢原子数来表示。
Hydrogen (h) always has valence 1, so other elements' valences equal the number of hydrogen atoms they combine with.
元素的特征价数是以该元素一个原子可结合的氢原子数或可从一化合物中置换出的氢原子数来表示。
Hydrogen (h) always has valence 1, so other elements' valences equal the number of hydrogen atoms they combine with.
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