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 s...
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 mechanics contribute to the question? Found....
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
What is the IUPAC periodic table based on? The Periodic Table The very first periodic table was organized according to the atomic mass of the elements. The elements were then grouped into columns according to the compounds they formed with oxygen. Answer and Explanation: 1 There is only one ...
Periodicity is one of the most fundamental aspects of the table of the elements. Here is an explanation of what it is and a look at the properties.
百度试题 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。
What is the periodic table? Periodicity: Periodicity is the characteristic to have certain trends that reoccurs or repeats itself at regular intervals. The interval at which the characteristics is repeated is known as a period. Periodicity allows one to predict future characteristics based on the es...
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 elements.”说明元素周期表能让化学家预测未知元素的性质,所以答案是 B。
B. The discovery of new elements. C. The destruction of existing elements. D. The combination of all E. lements. 相关知识点: 试题来源: 解析 B。解析:文章中提到“One area of research is the discovery of new elements.”,未来元素周期表的一个研究领域是发现新元素。
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