说到托福阅读备考，大家首先想到的肯定是OG和TPO。作为托福必不可少的备考神器，通过TPO练习来更好的适应考试的节奏。本文对TPO16 Development of the Periodic Table这篇文章的题材和部分题目进行了简单的分析，希望能够给正在备考托福阅读的大家带来一些参考的作用。
TPO16 Development of the Periodic Table
文章题材：自然科学——元素周期表的演进
常见词汇：
slightly ['slaitli] adv. 些微地，苗条地
pattern ['pætən] n. 图案，式样，典范，模式
nucleus ['nju:kliəs] n. 核，核心，细胞核，原子核
gaseous ['gæsiəs] adj. 气体的，气态的联想记忆
superior [su:'piəriə] n. 上级，高手，上标adj. 上层的
inter [in'tə:] vt. 埋葬
periodic [.piəri'ɔdik] adj. 周期的，定期的，间歇的，完句的
spectrum ['spektrəm] n. 光谱，范围，系列
scheme [ski:m] n. 方案，计划，阴谋v. 计画，设计，体系
illustrate ['iləstreit] v. 举例说明，(为书)作插图，图解
易错题解析：
Paragraph 1: The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number (the number of protons in the nucleus). It is a monumental scientific achievement, and its development illustrates the essential interplay between observation, prediction, and testing required for scientific progress. In the 1800's scientists were searching for new elements. By the late 1860's more than 60 chemical elements had been identified, and much was known about their descriptive chemistry. Various proposals were put forth to arrange the elements into groups based on similarities in chemical and physical properties. The next step was to recognize a connection between group properties (physical or chemical similarities) and atomic mass (the measured mass of an individual atom of an element). ， Thus when the series of elements was written so as to begin a new horizontal row with each alkali metal, elements of the same groups were automatically assembled in vertical columns in a periodic table of the elements. This table was the forerunner of the modern table.
2. According to paragraph 1, what pattern did scientists notice when the known elements were written in order of increasing atomic mass?
○The elements of the group of alkali metals were the first elements in the order of increasing atomic mass.
○Repetition of the same atomic masses for elements in different groups appeared.
○Elements with similar chemical properties appeared in the listing at regular intervals.
○Elements were chemically most similar to those just before and after them in the order.
题型：事实信息题。答案是(C)
解析：根据题干关键内容when the known elements were written in order of increasing atomic mass定位至原文倒数第二句，题干中的notice就等同于句子中的found，所以that从句里的内容即应该是答案。本句可翻译为:当(化学家)把那时候已知的元素按照原子量的增加排列时，(他们)发现一些连续性的元素分属于不同的化学组，这些化学群组的排列顺序是固定的并且会每隔一段间隔后就会发生重复。C选项的内容(有类似化学特性的元素列每隔一段时间会发生重复)与that从句部分的内容一致，所以选项C正确。
14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
The periodic table introduced by Meyer and Mendeleyev was the forerunner of the modern table of elements.
Answer Choices
○ Lord Rayleigh provided evidence that the structure of the periodic table limited the potential number of elements。
○Ramsay and Lord Rayleigh challenged the importance of Chemical research that Henry Cavendish had done a century earlier.
○ Isotopes of a given element have exactly the same physical properties, but their chemical properties are slightly different.
○ Mendeleyev and Meyer organized the known elements into a chart that revealed periodic recurrences of chemical and physical properties.
○ Mendeleyev's successful prediction of the properties of then- unknown elements lent support to the acceptance of the periodic law.
○In the 1890's, Ramsay and Lord Rayleigh isolated argon and proposed the existence of a new series of elements.
题型：文章小结题。答案是(DEF)
文章大意：
第1段：化学元素周期表的初步形成过程。
第2-3段：元素周期表的进一步发展(门捷列夫和Meyer首次列出了化学元素周期表，并提出了周期表的一些特点，元素周期表的排列顺序特点(第二段);元素周期律的发现(第3段))
第4段：元素周期表中一些新种类元素(稀有气体)的加入。
解析：D选项是第二段意思的总结。
E选项说的是元素周期律，是第三段里的重要信息，是文章中心topic的重点方面，所以入选。
F选项说的是稀有气体的发现，是对元素周期表的重要补充，属于第四段意思的主要内容，也是围绕文章中心说的重要方面，所以入选。
A和C的内容错误，B项的说法与原文中的信息相矛盾。
以上就是小编带来的托福阅读浅析之TPO16 Development of the Periodic Table,希望能够帮助大家进行备考。更多托福考试资讯请关注前程百利。
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