分子中原子的种类和数量决定分子质量。

The kind and number of atoms in a molecule determine a molecular mass.

youdao

元素的原子数，是元素的一个分子中原子的数目。

The atomicity of an element is the number of atoms in one molecule of the element.

youdao

根据分子结构的特点，用距离矩阵表征分子中原子的连接性。

Based on the characteristics of molecular structure, the distance matrix was used to characterize the connectivity of the atoms in the molecule.

youdao

And in this case, the tie-breaker goes to the molecule in which the negative charge is on the most electronegative atom.

而在这种情况下，我们需要进行“附加赛“,也就是看看分子中带有负的,形式电荷的原子是不是电负性最高的。

麻省理工公开课 - 化学原理课程节选

Now, chlorine I have to do a little bit more heavy lifting here because chlorine starts as a diatomic molecule.

现在，对于氯,我将会做更多的说明,因为氯元素起初存在于双原子分子中。

麻省理工公开课 - 固态化学导论课程节选

Step three in our Lewis structure rules is to figure out how many electrons we would need in order for every single atom in our molecule to have a full valence shell.

路易斯结构规则的第三步是,找出让分子中每个原子的价壳层,都排满应该需要多少个价电子。

麻省理工公开课 - 化学原理课程节选