Valence Number of bonds (see bonding) an atom can form.
元素的一个原子能够结合其它原子的数目。
Determination of trace arsenic from water sample by hydride atom absorption, and effect of valence number of arsenic and varied coexisting ions on the determination were discussed.
采用氢化物原子吸收法测定样品中痕量砷，对于样品的前处理及采用氢化物法测定砷含量时，砷的不同价态及共存离子的影响，分别进行了探讨。
For our step two, what we need is number of valence electrons.
我们的第二步，需要知道价电子的个数。
So, if we want to figure out the formal charge on the carbon, we need to take the number of valence electrons, so that's 4. We need to subtract the lone pair, what number is that? It's 2.
如果我们想算出碳原子的形式电荷，我们需要将价电子的个数，也就是四，减去孤对电子的个数，它是多少？是二。
PROFESSOR: five — there's five valence electrons, but the atomic number is actually seven.
教授：5，有5个价电子，但原子序数是7。
The result shows that the transition from vibrational to rotational spectrum is mainly caused by the increase of valence nucleon number.
结果表明，从振动能谱向转动能谱的过渡主要是由价核子数增加引起的。
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。
The doublet nature of this and other lines in the na spectrum indicates a doubling of the expected number of states available to the valence electron.
钠光谱中的这条线以及其它线的双重性指出预期价电子可用的状态数是双重的。
So then in order to figure out the complete number of valence electrons in our molecule, we just add 5 plus 4 plus 1.
那么接下来为了得到，这个分子中价电子的总个数，我们只需要将五加上四，再加上一。
By calculating the number of valence electron shell, we can gain the geometry array of the electronic pair, and then judge the molecular structures.
计算出价层电子对数，得到电子对的几何排布，从而判断出分子的几何构型。
Its result has to be colibrated. Because the structure of organic substances is complicated, the number of oxidation valence of carbon is assumed zero when calculating organic carbon.
重铬酸钾—硫酸亚铁法主要难题是在计算时无法知道沉积物中有机碳的氧化数，因而所测值不够准确。
The local fabric evolution(void number, the valence and the coordination number) and macroscopic mechanical behavior were investigated under quasi-static biaxial loading at small deformation.
在准静态、小变形条件下，研究了试样的微观织构变化和宏观力学行为。
The local fabric evolution(void number, the valence and the coordination number) and macroscopic mechanical behavior were investigated under quasi-static biaxial loading at small deformation.
在准静态、小变形条件下，研究了试样的微观织构变化和宏观力学行为。
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