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
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).
Scerri ER, 2012 What is an element? What is the periodic table? And what does quan- tum mechanics contribute to the question? Found. Chem. 14, 1, 69-81. (doi:10.1007/ s10698-011-9124-y).Scerri, E.R.: What is an element? What is the periodic table? And what does quantum ...
百度试题 结果1 题目What is the second element on the periodic table of elements? A.HydrogenB.Helium 相关知识点: 试题来源: 解析 B 反馈 收藏
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 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
The mostreactivemetal on the periodic table isfrancium. Francium, however, is a laboratory-produced element and only minute quantities have been made, so for all practical purposes, the most reactive metal iscesium. Cesium reacts explosively with water, though it is predictedfranciumwould react eve...
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...
What is Se on the periodic table? What is CA on the periodic table? What are the nonmetals in a periodic table? What are some metals on the periodic table? What group is flerovium in on the periodic table? What is the fourth element on the periodic table?