根据同分异构的化学原理，有机物有相同的分子式和相同的官能团时，它们的化学性质和物理性质很相似。
According to the principle of isomeric chemistry, when organic substances have the same molecular formula and the same functional groups, their chemical and physical properties are very similar.
这两位化学家都非常有远见，他们对周期性的物理性质和化学性质进行分析，并在预示应该出现新元素的地方留下了空位。
Both chemists were sufficiently farsighted to leave gaps where their analyses of periodic physical and chemical properties indicated that new elements should be located.
本文从化合物中氢键的结构出发，探讨了氢键形成对化合物的物理性质和化学性质的影响。
From the structure of hydrogen-bond in the compound, this paper discusses the influence of hydrogen-bond on the physical and chemical properties of the compound.
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