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 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
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
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? What is hydrogen on the periodic table?
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
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(...
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 ).
NA(a) What is a group in the periodic table in which part of a group would you separately expect elements to have (i) the greatest metallic character (ii) the largest atomic size? (b) In what respects do the properties of group 1 elements differ from
Periodic Table: The periodic table is a system for arranging materials. It's worth noting that they're organized into columns and rows. 'Periods' are the horizontal rows that run from left to right, while 'groups' are the vertical columns (going from up to down). ...
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...