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?
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
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 of The Elements?"It is a huge, efficient resource!"The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic...
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).
In the periodic table, a chemical element is represented by a fixed format : Atomic number= Total number of protons Atomic symbol= One or two letters from the symbol’s name The periodic table can be classified in three groups: 1. Metals ...
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 ).
A. The creation of old elements. 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...
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 ...