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 ...
Scerri, E.R.: What is an element? What is the periodic table? And what does quantum mechanics contribute to the question? Found. Chem. 14 , 69–81 (2012)E. R. Scerri: What is an element? What is the periodic table? And what does quantum mechanics contribute to the question?
Q.What is meant by groups and periods in the periodic table? Q.What are groups of the modern periodic table .What does the 'group number' signify Q. In the modified Mendeleev’s periodic table,___ groups and ___ periods are present, whereas in modern periodic table,___ groups and _...
The two rows of elements below the body of the periodic table are metals. Specifically, they are a collection of transition metals that are calledthe lanthanides and actinidesor the rare earth metals. These elements are located below the table because there wasn't a practical way to insert th...
periodic theory, some of which are quite rare in nature. Inconsistencies with arrangement according to atomic weight and observed chemical behaviors of some elements still limited the value of the periodic table. Eventually arrangement of the periodic table was restructured by H.G. Mosely, using an...
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 is a table of all the elements we know about today. Elements are placed in order of atomic number ( number of protons in the nucleus ).
The above question can be answered by having a thorough study of the periodic table and understanding how and why the elements are placed at certain specific positions. The periodic table is orderly arrangement of elements in various periods and groups on the basis of their atomic number, ...
There are 118 chemical elements known to man. This is a large number and with all these elements combining to make different compounds, understanding them can be very confusing. Here to the rescue we have the Periodic Table, a tabular arrangement of all the known chemical elements according to...
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