结果1 题目What are the horizontal rows in the periodic table called? A. Groups. B. Periods. C. Elements. D. Compounds. 相关知识点: 试题来源: 解析 B。中文解析:“The periods are horizontal rows”,周期表中的水平行称为周期。反馈 收藏 ...
百度试题 结果1 题目What is a row of elements on the periodic table called? A. octave B. period C. group D. transition 相关知识点: 试题来源: 解析 B 反馈 收藏
Periodic tableMadelung ruleThis article considers two important traditions concerning the chemical elements. The first is the meaning of the term "element" including the distinctions between element as basic substance, as simple substance and as combined simple substance. In addition to briefly tracing ...
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解析 Ans. The d block elements are in the middle of S and p blocks, comprising the groups 3to 12.They are the four rows of elements in the periods 4h (3d series), 5th (4d series), 6th ( 5d series)and 7h ( 6d series).
The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom ...
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A. All elements are solids. B. Elements in different periods have no similarities. C. The periodic table helps us understand the relationships between elements. D. The periodic table only shows the names of E. lements. 相关知识点: 试题...
The periodic table of the elements is a representation of all known elements in an orderly array. The periodic law presented by Dmitri Mendeleev in 1869 stated that if the (known) elements are arranged by atomic weight, then certain trends in chemical properties can be observed. That is to ...
What is mainly discussed in the passage? A. The biology’s periodic table. B. The possible influence of decoding human genome on human’s life. C. Moral dilemmas posed by decoding human genome. D. Gene E. xpression monitoring. 相关知识点: ...