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
百度试题 结果1 题目What are the horizontal rows in the periodic table called? A. Groups B. Blocks C. Periods D. Orbitals 相关知识点: 试题来源: 解析 C。原因:文章中明确提到“The horizontal rows are called periods.”。 反馈 收藏
A.The outermost layers have the same number of electron.B.They have the similar chemical properties.C.The number of electron layers from top to bottom gradually increases.D.The atomic radius from top to bottom gradually increases.相关知识点: 试题...
A. Predict the weather B. Predict the properties of unknown elements C. Build better houses D. Cook better food 相关知识点: 试题来源: 解析 B。解析:“The periodic table has allowed chemists to predict the properties of unknown elements and to understand the relationships between different elemen...
Element Group Although an element group often is defined as a column of the periodic table, it's common to refer to groups of elements that span multiple columns, excluding some elements. An example of an element group is the semimetals ormetalloids, which follow a zig-zag path down the pe...
What is the name of the Group of the Periodic Table in which all the elements have a valence shell electron configuration ns^2np^0? What is the valence electron configuration of Group 6A elements? Which group in the periodic table contains elements with the valence electron configurat...
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...
Periods in the periodic table run horizontally and indicate the number of electron shells; Groups run vertically, representing elements with similar chemical properties and the same number of electrons in their outer shell.
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 _...