TPO16第二篇阅读元素周期表第二小题，提问

坠坠芙蓉影UID: 2815408

文章是这样的：
When the elements known at the time when ordered by increasing atomic mass, it was found that successive elements belonged to different chemical groups and that the order of the groups in this sequence was fixed and repeated itself at regular intervals.
题目：
According to paragraph1, what pattern did scientists notice when the known elements were written in order of increasing atmoic mass?
1.The elements of the group of alkali metals were the first elements in the order of increasing atomic mass.
2.Repetition of the same atomic messes for elements in different groups appeared.
3.Elements with similar chemical properties appeared in the listing at regular intervals.
4.Elements were chemically most similar to those just before and after them in the order.

我选2，但答案选3， 非常想不通。请指教，谢谢！

坠坠芙蓉影UID: 2815408

up up

蝶飞依依UID: 2905269

同学，这道题选项2偷换概念，repeated itself 我觉得itself指代的是the order of the groups in this sequence不是same atomic messes 。
而且根据化学知识我们知道，选项2是不符合科学规律的~~

坠坠芙蓉影UID: 2815408

那为什么选3呢？
读高中的时候理科就不好，进了大学更加是把数学物理化学全部还给老师了，所以完全不懂~~~~~