元素周期律（Periodic law），指元素的性质随着元素的原子序数（即原子核外电子数或核电荷数）的递增呈周期性变化的规律。周期律的发现是化学系统化过程中的一个重要里程碑。
元素周期律 [yuán sù zhōu qī lǜ]
双语例句原声例句
-
好的，这是一个关于使用元素周期律的反例。
All right. So that is an anti-example of using periodic trends.
-
提出了一种新的元素周期律的阵列式图示方法。
A new method to present the periodic law, the visual graphic form of the periodic system of elements, is proposed in this paper.
-
他最早向国内读者介绍了化学元素周期律，也是制订有机物系统名称的第一个人。
He was the earliest one to introduce to domestic readers the periodic law of chemical elements, as well as the first person to work out systematic terms for organic compounds.
-
So, let's just take a quick example to show how not completely you can use these periodic trends, that there are limits.
那么，让我们举一个小例子来看一下,你是如何不能将元素周期律用在所有地方的，它是有局限性的。
-
But you actually need to keep a few caveats in mind as you do this, which is the fact that trends predict a lot of chemical properties, but they can't predict everything in terms of biological properties.
不过在你使用的过程中,需要牢记一些注意事项,那就是元素周期律可以预言很多化学性质，但是不能预言一切性质,比如生物学性质。
-
So anyway, when we talk about periodic trends, it doesn't always match up.
无论如何，当我们讨论元素周期律时，要知道它并不是总能与实际情况相符。
应用推荐
$firstVoiceSent
- 来自原声例句