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
Written and fact-checked by The Editors of Encyclopaedia BritannicaThe 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 ...
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...
The modern periodic table is slightly different to the one created by Mendeleev as it is ordered by atomic number, not atomic mass. Chemical symbols that don’t look like their name Each element has a chemical symbol that is the same in every language. Some are obvious, such as Li for L...
百科挑战题1) What is the letter forprop in the periodic table of chemical elements(化学素周期)? A.Fe B.Zn C.Ha2) What is the best way to look up information on the interne? A. By using e-mail B. By using QQ B33) What is the material of pengl leag()? A.lime B. graphite(...
Hint: It has one electron!First Element of the Periodic Table:The periodic table is a table in which the chemical elements are arranged by atomic number. It starts with the element with the lowest atomic number all the way to the element with the highest atomic number, Oganess...
An atom consists of a fixed number of protons, electrons and neutrons, which makes each element unique. Protons and neutrons together make up thenucleus of an atomwhile the electrons orbit around it. In the periodic table, a chemical element is represented by a fixed format : ...
How to Identify It:This isn't a simple number but includes the orbitals. Examples:The electron configuration for hydrogen is 1s1. Other Information on the Periodic Table The periodic table includes other information besides numbers. Now that you know what the numbers mean, you can learn how to...
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...
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.